Linear Regression - Assessment

1.

Multiple Choice

15 mins

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 mins

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 mins

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 mins

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 sec

1 pt

What letter do we use to represent correlation coefficient?

c

r

p

h

6.

Multiple Choice

45 sec

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 mins

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 sec

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 sec

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 sec

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 sec

1 pt

Write the linear regression equation for the following data points. Round to the nearest tenth.

$y=-0.27x+3.93$

$y=3.93x+-0.27$

$y=1.25x+3.75$

$y=0.27x+3.94$

Explore this activity with a free account