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Mary Gage

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Mathematics

University

Linear Regression

Mary Gage

1.2K
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11 questions

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1. Multiple Choice
15 minutes
1 pt
A restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data.
y = 1.5x + 12
y = 12x + 1.5
y = 0.67x - 8
y = -8x + 0.67
2. Multiple Choice
2 minutes
1 pt
The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.
12 chapters
15 chapters
18 chapters
21 chapters
3. Multiple Choice
15 minutes
1 pt
If x is temperature and y is coffee sales, use the following formula to determine the coffee sales on a 34° day.
y = -60x+6443
$4403
$4673
$8483
$6443
4. Multiple Choice
15 minutes
1 pt
The chart below tracts starting salaries for health care workers since the year 2000. Using linear regression, find the equation of best fit. Round decimals to 3 places.
y = 839.721x + 27541.812
y = 27541.812x - 839.721
y = 27541.812x + 839.721
y = 839.721x - 27541.812
5. Multiple Choice
30 seconds
1 pt
What letter do we use to represent correlation coefficient?
c
r
p
h
6. Multiple Choice
45 seconds
1 pt
What is a best-fit line used for?
To make predictions
To make the graph look pretty
To connect the points
To make it look like you know what you are doing
7. Multiple Choice
5 minutes
1 pt
Find the equation of the line of best fit for the given data
y = 163.41x+1.49
y =- 163.41x+ 4.19
y =- 4.19x+163.41
y = 4.19x -163.41
8. Multiple Choice
30 seconds
1 pt
Write the equation for the linear regression shown.
$y=ax+b$
$y=0.6x+0.1$
$y=0.72x+r$
$y=0.1x+0.6$
9. Multiple Choice
30 seconds
1 pt
Write the equation for the linear regression shown.
$y=-5.11x+3.23$
$r=0.8$
$y=3.23x\ -\ 5.11$ $\$
$y=0.64x+0.8$
10. Multiple Choice
30 seconds
1 pt
Write the linear regression equation for the following data points. Round to the nearest tenth.
$y=-0.83x+0.61$
$y=-0.83x+0.63$
$y=0.83x+-0.8$
$a^2+b^2=c^2$
11. Multiple Choice
30 seconds
1 pt
Write the linear regression equation for the following data points. Round to the nearest tenth.
$y=-0.27x+3.93$
$y=3.93x+-0.27$
$y=1.25x+3.75$
$y=0.27x+3.94$
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