The propensity scoring method is a statistical technique used to adjust for differences in the characteristics of groups being compared in a study. In this case, we want to adjust for the fact that respondents aged 70 or older are underrepresented in an internet sample.
To do this, we can assign a propensity score to each individual in the sample based on their likelihood of being in the sample, given their age. We can then use this score to weight their responses to account for the underrepresentation of older individuals.
In this case, we know that respondents aged 70 or older are only one-third as likely to be in an internet sample as their actual incidence in the population. This means that we can assign a propensity score of 3 to each individual aged 70 or older in the sample, and a propensity score of 1 to everyone else.
Using these propensity scores, we can weight the responses of each individual in the sample. Responses from individuals with a propensity score of 3 would be weighted by a factor of 3, while responses from individuals with a propensity score of 1 would be weighted by a factor of 1.
By adjusting for the underrepresentation of older individuals in this way, we can obtain more accurate estimates of the characteristics of the population being studied, and reduce the potential for bias in our analysis.
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if the numerator of a certain fraction is a quarter of the value of the whole fraction, what is the value of the denominator of that fraction?
When the numerator of a certain fraction is a quarter of the value of the whole fraction, the value of the denominator of that fraction is four times the value of the numerator
The denominator of a certain fraction is a number that divides the numerator to produce a fraction. The fraction has two parts, the numerator, and the denominator. The numerator is the top part of a fraction, and the denominator is the bottom part of the fraction. When the numerator of a certain fraction is a quarter of the value of the whole fraction, the value of the denominator of that fraction can be calculated using a mathematical formula.
The mathematical formula for calculating the value of the denominator of a certain fraction is to divide the numerator by the quarter. This is because the numerator is a quarter of the value of the whole fraction. Therefore, the formula is represented as:D = N/1/4where D is the denominator, and N is the numerator of the fraction.To solve for D, we multiply both sides by the reciprocal of the fraction:1/4 = 4/1, so we have:D = N x 4/1D = 4N/
Therefore, the value of the denominator of the fraction is four times the value of the numerator. If the numerator of the fraction is 2, then the denominator of the fraction is 8. In summary, when the numerator of a certain fraction is a quarter of the value of the whole fraction, the value of the denominator of that fraction is four times the value of the numerator.
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the radius of a circle is 6 inches what is the area of a sector biunded by 180 degrees arc
The area οf the sectοr bοunded by a 180 degrees arc with a radius οf 6 inches is 18π square inches.
Hοw tο calculate the area οf the sectοr bοunded by a 180 degrees arc?The area οf a sectοr bοunded by a central angle θ and radius r is given by the fοrmula:
A = (θ/360) x πr²
In this case, the central angle is 180 degrees and the radius is 6 inches. we get:
A = (180/360) x π(6²)
= (1/2) x π x 36
= 18π
Therefοre, the area οf the sectοr bοunded by a 180 degrees arc with a radius οf 6 inches is 18π square inches.
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at steady state, the throughput time for one loaf is 3 hours 30 minutes. how much total wip is in the system, in loaves
At steady state, the total WIP in the system is equal to the throughput time divided by the time it takes to make one loaf. Thus, the total WIP in the system is 3.5 loaves.
The total WIP in a system is the sum of all of the work that is in progress. At steady state, the total WIP in the system can be calculated by dividing the throughput time (the time it takes for one loaf to be processed from start to finish) by the time it takes to make one loaf.
In this example, the throughput time is 3 hours 30 minutes and it takes 1 hour to make one loaf. Therefore, the total WIP in the system is 3.5 loaves. This means that at any given time, there are 3.5 loaves in progress in the system.
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How do I solve this?
The unit digit of the given sum [tex]1998^{1999}-1999^{1998}[/tex] is one according to the one's place of 8 and 9 powers.
Here, we need to find the unit digit of [tex]1998^{1999}[/tex] :
8 power of any dight will give us the unit digit of 8, 4, 2 and 6.
Here 8 has power 9.
Then the unit place of the sum will be equal to 2.
Similarly, we need to find the sum of other one.
Other sum: [tex]1999^{1998}[/tex]
9 power of 8
9 power of odd numbers will give 9 as unit digit.
9 power of even numbers will give 1 as unit digit.
Here, we have 8 as power the, we will get the unit digit as 1.
Now we need to simplify the sum.
Unit digit of [tex]1998^{1999}-1999^{1998}[/tex] is equal to 2 - 1 = 1.
The unit digit of the given sum [tex]1998^{1999}-1999^{1998}[/tex] is one.
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Find the values of x and y. Show all of your work.
for each triangle find the given side length round to the nearest tenth
The missing side length for the triangle is given as follows:
[tex]x = \frac{16\sqrt{3}}{3}[/tex]
What are the trigonometric ratios?The three trigonometric ratios are the sine, the cosine and the tangent, and they are defined as follows:
Sine of angle = length of opposite side to the angle divided by the length of the hypotenuse.Cosine of angle = length of adjacent side to the angle divided by the length of the hypotenuse.Tangent of angle = length of opposite side to the angle divided by the length of the adjacent side to the angle.For the angle of 60º on the triangle, we have that:
The opposite side is of 16.The adjacent side is of x.The tangent of 60º is equals to the square root of 3, hence the value of x is obtained as follows:
tan(60º) = 16/x
[tex]\sqrt{3} = \frac{16}{x}[/tex]
[tex]x = \frac{16}{\sqrt{3}} \times \frac{\sqrt{3}}{\sqrt{3}}[/tex]
[tex]x = \frac{16\sqrt{3}}{3}[/tex]
Missing InformationThe triangle is given by the image presented at the end of the answer.
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when on a stem and leaf plot and it does not show a number on the right side and only on the right side what would the number be on the right?
When on a stem and leaf plot and it does not show a number on the right side and only on the right side, the number on the right side would be zero.
What is a stem and leaf plot?A stem and leaf plot is a method of organizing numerical data into groups. It is a visual representation of a dataset in which each value is separated into a stem and a leaf. A stem is the left-hand digit(s) of the value, while a leaf is the right-hand digit(s).
The stem and leaf plot contains two columns, one for the stem and the other for the leaf. The stem values are arranged vertically in the left-hand column, and the leaf values are arranged horizontally in the right-hand column. The leaf column should be read from left to right to extract the values.
When a value appears multiple times, its leaves are stacked on top of one another. The stem and leaf plot is an effective method for representing data, particularly when dealing with large datasets.
Hence, If a stem and leaf plot displays a number only on the left side and not on the right side, then the number on the right side would be interpreted as zero.
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find the surface area of the prism
The surface area of the prism is 264m²
What is surface area of prism?A prism is a solid shape that is bound on all its sides by plane faces. There are different types of prism but the specific one we will be talking about here is triangular based prism.
The surface area of a prism is obtained by adding the area of the faces. Therefore surface area = 2B +ph
area of the base = 1/2 bh
= 1/2 × 6 × 8
= 1/2 × 48
= 24m²
using Pythagoras theorem, the hypotenuse of the triangle = √ 6²+8²
= √ 36+64
= √100 = 10m
perimeter of the base = 6+8+ 10
= 24m
Therefore SA = 2×24 + 24 × 9
= 48 + 216
= 264m²
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PLEASE HELP ME SOLVING THIS CHART PLEASEEE I TRIED BUT I DON'T FEEL IT RIGHT
The interior angle of a regular polygon with n sides is 150 degrees. Calculate the value of n
Answer:
n=12
Step-by-step explanation:
sum of interior angles of polygon with n sides = (n-2)180
measure of an interior angle of a polygon times the number of sides (n) = sum of interior angles of polygon with n sides, therefore:
(n - 2)180 = 150n
180n - 360 = 150n
30n = 360
n = 360/30 = 12
Write the ratios for sin A and cos A. The diagram is not drawn to scale.
sin A= 14/50 cos A 48/50
sin A= 48/50 cos A 14/50
sin A 48/14 cos A 14/50
sin A= 48/50 cos A 14/48
The ratio of SINA and COSA = 48/50 and 14/50
What is trignometric ratios?This is the boundary or contour length of a 2D geometric shape.
Depending on their size, multiple shapes may have the same circumference. For example, imagine a triangle made up of wires of length L.
The same wire can be used to create a square if all sides are the same length.
The length covered by the perimeter of the shape is called the perimeter. Therefore, the units of circumference are the same as the units of length.
As we can say, the surroundings are one-dimensional. As a result, you can measure in meters, kilometers, millimeters, etc.
Inches, feet, yards, and miles are other globally recognized units of circumference measurement.
According to our question,
sina = perpendicular\ hypotenuse
= 48/50
cosa= base\ perpendicular
=
14/50
Hence, The ratio of SINA and COSA = 48/50 and 14/50
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I WILL MARK BRAINLIEST
Answer: If Ava sells a $365 laptop, then she will make $91.25 in commissions.
Step-by-step explanation: 25% of 365 is 91.25
michael got a score of 83 on a geography test that has a mean of 72 and a standard deviation of 6 and josh got a score of 61 on an accounting test that has a mean of 55 and a standard deviation of 3, find the z-score
a) Michael's z-score is 1.83.
b) Josh's z-score is 2.
A z-score (also known as a standard score) is a statistical measurement that represents the number of standard deviations a data point is from the mean of the population. It's a way to standardize scores from different populations or datasets, allowing for easier comparisons.
To find the z-score, we use the formula
z = (x - μ) / σ
where
x = the individual score
μ = the mean of the population
σ = the standard deviation of the population
For Michael's score
x = 83
μ = 72
σ = 6
z = (83 - 72) / 6 = 1.83
Therefore, Michael's z-score is 1.83.
For Josh's score
x = 61
μ = 55
σ = 3
z = (61 - 55) / 3 = 2
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in how many ways can a sample of 5 keyboards be selected so that exactly two have an electrical defect?
There are 105 ways to select a sample of 5 keyboards from a set of 10 keyboards such that exactly 2 of the keyboards have an electrical defect.
To find the number of ways to select a sample of 5 keyboards so that exactly 2 have an electrical defect, we can use the combination formula:
C(n,k) = n! / (k! * (n-k)!)
where n is the total number of keyboards, k is the number of defective keyboards, and C(n,k) is the number of ways to choose k defective keyboards from a total of n keyboards. Here, n = 10 (assuming there are 10 keyboards in the sample), and k = 2.
We can choose 2 defective keyboards from the total of 3 defective keyboards in C(3,2) = 3 ways. We can also choose 3 non-defective keyboards from the total of 7 non-defective keyboards in C(7,3) = 35 ways. Therefore, the total number of ways to select a sample of 5 keyboards so that exactly 2 have an electrical defect is:
C(3,2) * C(7,3) = 3 * 35 = 105
So there are 105 ways to select a sample of 5 keyboards from a set of 10 keyboards such that exactly 2 of the keyboards have an electrical defect.
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What is the domain of h(t)= -16t^2 + 112t + 60?
Answer:
The function h(t) = -16t^2 + 112t + 60 is a quadratic function, which means it is defined for all real numbers.
Therefore, the domain of h(t) is the set of all real numbers. In interval notation, we can express this as:
Domain of h(t): (-∞, ∞)
a marketing research company desires to know the mean consumption of milk per week among people over age 32. they believe that the milk consumption has a mean of 3.1 liters, and want to construct a 98% confidence interval with a maximum error of 0.1 liters. assuming a standard deviation of 0.9 liters, what is the minimum number of people over age 32 they must include in their sample? round your answer up to the next integer.
The minimum number of people over age 32 they must include in their sample or sample size is equals to the 486.
In this question, we will use the margin of error of the 98% confidence interval for the population mean to determine the minimum sample size. We have to provide following informations for consumption of milk per week among people over age 32.
Mean = 3.1 liters
Confidence interval = 98%
Maximum/Margin of error = 0.1 liters
Standard deviations = 0.9 liters
level of significance, α = 1 - 0.98 = 0.02
or α/2 = 0.01
We have to determine the sample size for people over age 32 they must include in their sample. The margin of error is calculated by multiplying a key factor (for a certain level of confidence) by the population standard deviation. The result is then divided by the square root of the number of observations in the sample. Mathematically, [tex] ME =Z_{\frac{\alpha}{2}}\sqrt{ \frac{ σ}{n} }[/tex]
Using the Z-distribution table, value of z for 98% of confidence interval is 2.326. Substituting the known values in above formula, 0.1 = 2.326 √0.9/n
=> √0.9/n = 0.1/2.33 = 0.043
=> 0.9/n = (0.043)² = 0.001849
=> n = 0.9/0.00185
=> n = 486.4865 ~ 486
Hence, required sample size is 486.
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HELP ME ASAPPPPP!!!!
Thus, the explicit formula for the simple interest sequence A(n) = P + (n-1)(i.P) is: A(n) = P * (1 + i * (n-1)).
What is simple interest?Simple interest is a method of calculating interest on a loan or investment where interest is charged only on the initial principal amount. In simple interest, the interest rate is applied to the original principal amount, and the interest earned remains the same throughout the entire term of the loan or investment.
by the question.
The formula for a simple interest sequence A(n) = P + (n-1) (i.P) represents the value of an investment that earns simple interest over n periods, where:
A(n) is the value of the investment after n periods.
P is the principal or initial investment
i is the interest rate per period as a decimal fraction (e.g. 0.05 for 5%)
n is the number of periods
To derive the explicit formula for A(n), we can use the formula for simple interest:
I = P * i * n
where I am the total interest earned over n periods. We can then express A(n) as:
A(n) = P + I
Substituting the expression for I, we get:
A(n) = P + P * i * (n-1)
Simplifying, we can factor out P to get:
A(n) = P * (1 + i * (n-1))
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Here are some clues to a mystery number.
• The GCF of 18, 36, and me is 2.
• 1 am a multiple of 5.
1 am greater than 18 and less than 30.
The only number between 18 and 30 that is a multiple of 5 and satisfies this condition is 20, Therefore, the mystery number is 20
How to determine the mystery numberThe GCF of 18, 36, and the mystery number is 2.
This means that the mystery number is divisible by 2.
The mystery number is also a multiple of 5, so it must end in either 0 or 5.
The mystery number is greater than 18 and less than 30, so it can only be 20 or 25.
Let's check if the GCF of 18, 36, and 20 is 2.
The factors of 18 are 1, 2, 3, 6, 9, and 18.
The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36.
The factors of 20 are 1, 2, 4, 5, 10, and 20.
The only factor that 18, 36, and 20 have in common is 2, so the mystery number is 20.
Therefore, the mystery number is 20.
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X 1 2 3 4 у 0 -3 -6 -9
what is the slope intercept form?
Answer:
y = -3x + 3
Step-by-step explanation:
Knowing that;
Slope Intercept form : y = mx + b
To Find the Slope:
Used any given ordered pair given and use- m = [tex]\frac{y_2-y_1}{x_2- x_1}[/tex]
Find the slope of the lineThen Plug it in the Slope Intercept formGiven Table:
X Y
1 0
2 -3
3 -6
4 -9
Solve:
I will use the ordered pair:
(1,0)
(2, -3)
1 and 2 are "x"
0 and -3 are "y"
1 = x₁ 2 = x₂0 = y₁ -3 = y₂m [tex]=\frac{-3-0}{2- 1}[/tex]
m [tex]=\frac{-3}{1}[/tex]
m [tex]=[/tex] -3
Now putting the value of m in equation
y = -3x + b
To find the y intercept (b) in the slope intercept formula:
Choose any ordered pair and substitute it in the slope intercept.
Let's choose the first point, (1,0) for calculating y-intercept.
y = mx + b0 = -3(1) + b0 = -3 + bb = 3Now plug it in the slope intercept formula:
y = mx + b
y = -3x + 3
Hence, the slope intercept form for that table is:
y = -3x + 3.
RevyBreeze
In 1900, about 3.05 million people lived in Texas. Altogether, about 76.1 million people lived in the United States. About how many people in the United States did not live in Texas. PLEASE HELP I ONLY HAVE 5 MINUTES
Answer:
Step-by-step explanation:
To find out how many people in the United States did not live in Texas in 1900, we can subtract the population of Texas from the population of the United States:
Number of people in the United States who did not live in Texas = Population of the United States - Population of Texas
Number of people in the United States who did not live in Texas = 76.1 million - 3.05 million
Number of people in the United States who did not live in Texas = 73.05 million
Therefore, about 73.05 million people in the United States did not live in Texas in 1900.
Answer: 73.05 million people in the United States did not live in Texas in 1900.
Step-by-step explanation:
the fox population iun a certain region has an annual growth rate of 9% per year. in the year 2012 there were 23900 fox counted in the area. what is the fox population predicted in the year 2020
The population of foxes in the region in 2020 is predicted to be 40,174.
The population of foxes in the region in 2020 can be calculated using the formula [tex]P = P0 (1+r)^n[/tex], where P is the population at the end of n years, P0 is the initial population, and r is the annual growth rate. The fox population iun a certain region has an annual growth rate of 9% per year. in the year 2012 there were 23900 fox counted in the area.In this case, P0 = 23900 and r = 0.09. Since the starting year is 2012, the number of years since then is n = 8. Plugging these values into the formula, P = 23900 (1.09)^8 = 40,174. Therefore, the population of foxes in the region in 2020 is predicted to be 40,174.
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select a correct multiple regression equation that can be used to analyze the data for a two-factorial design with two levels for factor and three levels for factor . define all variables.
A multiple regression equation that can be used to analyze the data for a two-factorial design with two levels for factor A and three levels for factor B can be written as:
Y = b0 + b1A + b2B + b3AB + e
where Y is the dependent variable, A is the independent variable for factor A, B is the independent variable for factor B, A*B is the interaction between A and B, and e is the error term.
The variables can be defined as follows:
Y: The dependent variable that is being measured in the study.
A: The independent variable representing factor A, which has two levels (A1 and A2).
B: The independent variable representing factor B, which has three levels (B1, B2, and B3).
A*B: The interaction term between factor A and factor B.
e: The error term that captures the variability in the dependent variable that is not explained by the independent variables.
This equation allows us to examine the main effects of both factors (A and B) as well as their interaction (A*B) on the dependent variable Y in a two-factorial design.
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a sample survey is to be conducted to determine the mean family income in an area. the question is how many families should be sampled? in order to get more information about the area, a small pilot survey was conducted, and the standard deviation of the sample was computed to be $400 with the mean of $60,000. the sponsor of the survey wants you to use the 0.99 degree of confidence. the estimate is to be within $90. how many families should be interviewed?
The sample size required is 182 families should be interviewed.
To calculate the number of families that should be interviewed to obtain the desired precision and degree of confidence, one must first determine the minimum sample size required to achieve the desired degree of confidence. As the standard deviation of the sample was computed to be $400 with the mean of $60,000.
Sample size formula: n = (Z² * s²) / E²
The formula for the degree of confidence: Z = 2.576
Sample size formula: n = (Z² * s²) / E²
Substituting the values, we get n = (2.576² * $400²) / $90²= 181.49 = 182 families. The sample size required is 182 should be interviewed families.
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How do the values of the 1s in 14. 937 and 6. 1225 compare?
The 1s in 14.937 and 6.1225 have distinct values. The digit 1 in 14.937 is in the thousandths place, representing a value of 0.001, but the digit 1 in 6.1225 is in the hundredths place, representing a value of 0.01.
When we compare the values of the 1s in these two numbers, we can observe that the 1 in 6.1225 is 10 times bigger than the 1 in 14.937. This is due to the fact that the place value of digit 1 in 6.1225 is ten times bigger than the place value of digit 1 in 14.937. It should be noted that while comparing the values of digits in numbers, their location or place value is a significant consideration. Even the smallest Changes in a digit's location can have a substantial influence on its total value. The variation in place value of the 1s in 14.937 and 6.1225 leads in a considerable disparity in their respective values in this situation.
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What is the length of the altitude drawn to the hypotenuse? The figure is not drawn to scale.
The length of the altitude drawn to the hypothenuse, WY as required to be determined is; 6.
What is length of segment WY?As evident from the task content, it follows that the length of the altitude, WY drawn to the hypothenuse is to be determined.
Let WY be represented as a;
By observation; it follows that the triangles WXY and WXY are similar triangles.
Hence, the ratio which holds in the figure is;
12 / a = a / 3
Therefore by cross-multiplication, we have that;
a² = 36
a = 6.
Ultimately, the length of the altitude drawn to the hypothenuse is; 6.
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1. Mr. Park pays $1000 per month in rent.
Before depositing his paycheck, his checking
account balance was $359.47. After the
deposit, it was $1441.33. Will Mr. Park have
enough money to pay his rent?
Answer:
Mr Park has enough money to pay his rent.
Step-by-step explanation:
The amount of the monthly rent paid = $1000
The account balance after depositing the paycheck = $1441.33
Now, to pay the rent,account should have more than the rent money $1000
Also, $1441.33 > $1000
⇒ The amount in the bank after depositing the paycheck > The rent to be paid
Hence, Mr Park has enough money to pay his rent.
What’s the area of this?
Answer:
Step-by-step explanation:
1) Cut the picture up into two rectangles
The larger rectangle has a length (15in+2in) of 17 and a width of 13. The smaller rectangle has a length of 2 and a width of 5.
2) Find the area of both rectangles
Rectangle 1: 17 x 13 = 221
Rectangle 2: 5 x 2 = 10
3) Add the area of both rectangles
221 + 10 =231
4) The answer is 231 inches squared
maurice is buying a house that has 1,200 square feet on the main, a vaulted entry, and 650 square feet on the top level, plus a 335-square-foot garage. what's included in the livable square feet?
The livable square footage of the house is 1,850 square feet.
To determine the livable square footage of the house, we need to exclude areas that are not considered living spaces. The main level of the house has 1,200 square feet and is considered livable space.
The top level has 650 square feet, but since it is not clear if the entire space is livable or if there are non-livable areas (such as an attic), we cannot assume that the entire space is livable.
Therefore, we will exclude the top level from our calculation of livable square footage. The garage is also not considered livable space, so we will exclude the 335 square feet of the garage as well.
Thus, the livable square footage of the house is 1,200 square feet (main level) + 0 square feet (top level) + 0 square feet (garage) = 1,200 square feet. Therefore, the total livable square footage of the house is 1,850 square feet.
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suppose you roll a pair of fair dice repeatedly. what is the probability that by the time the sum has been even three times, the sum has already been 7 twice?
The probability that by the time the sum has been even three times, the sum has already been 7 twice is 1/36.
This is because the total number of possible combinations of two dice is 36, and only one combination, (3,4), has the sum of 7 and is also an even number.
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a line in the xy-plane passes through the origin and has a slope of 1 7 . which of the following points lies on the line? a) (0, 7) b) (1, 7) c) (7, 7) d) (14, 2)
the y-coordinate must be 7 in order for the point to lie on the line.
A line in the xy-plane passes through the origin and has a slope of 1/7. Point B (1, 7) lies on the line, as the slope of the line is calculated by the equation y = mx + b, where m is the slope of the line, and b is the y-intercept. Since the line passes through the origin, the y-intercept is 0. This can be expressed as y = (1/7)x + 0
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