Quiz about Scatterplots and Line of Best Fit

Question 1

Which scatter plot shows no relationship?

Accepted Answer

Graph D

Answer

Graph A

Answer

Graph B

Answer

Graph C

Question 2

A restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data.

Accepted Answer

y = 1.5x + 12

Answer

y = 12x + 1.5

Answer

y = 0.67x - 8

Answer

y = -8x + 0.67

Question 3

Question 3.

Accepted Answer

y = 1.45x + 22

Answer

y = -2x + 15

Answer

y = 1.33x + 30

Answer

y = -1.5x + 24

Question 4

Is this line an accurate line estimate of best fit for the data?

Accepted Answer

Yes

Answer

No

Question 5

Which of the following lines represents the line of best fit for the scatter plot?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 6

Question 6.

Accepted Answer

y = 0.5x + 2 ; 12

Answer

y = x ; 20

Answer

y = x + 2 ; 22

Answer

y = 2 ; 2

Question 7

Which equation best represents the line of best fit shown below?

Accepted Answer

y = 3x + 4

Answer

y = 4x

Answer

y = 6x + 4

Answer

y = 4x + 4

Question 8

Which of the following lines represents the line of best fit for the scatter plot?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 9

Imagine you're helping Zoe, Mia, and Isla find the perfect line of best fit for their scatter plot project. Which of the following lines do you think will earn them an A+?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 10

Which of the following could be a possible line of best fit for the data?

Accepted Answer

y = 5/6x + 490

Answer

y = 3x + 0

Answer

y = -2x + 470

Answer

non linear

Question 11

What is the equation of the line of best fit?

Accepted Answer

y= $$-\frac{1}{2}x\ +\ 6$$

Answer

y= $$\frac{1}{2}x\ +6$$

Answer

y= 6x + 2

Answer

y = -2x +6

Question 12

Is this line an accurate line estimate of best fit for the data?

Accepted Answer

No

Answer

Yes

Question 13

Predict what the next point would be on the scatterplot.

Accepted Answer

(30,100)

Answer

(20,20)

Answer

(10,0)

Question 14

What is a best-fit line used for?

Accepted Answer

To make predictions

Answer

To make the graph look pretty

Answer

To connect the points

Answer

To make it look like you know what you are doing

Question 15

The annual profits for a company are given in the following table, where x represents the number of years since 1992, and y represents the profit in thousands of dollars. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest hundredth. Using this equation, estimate the year in which the profits would reach 378 thousand dollars.

Accepted Answer

2003

Answer

2029

Answer

2014

Answer

8753

Question 16

What is the independent variable?

Accepted Answer

Precipitation

Answer

Cucumber Yield

Answer

kg

Question 17

Find the slope.

Accepted Answer

3/2

Answer

-3/2

Answer

(-0,-3)

Answer

none of the above

Question 18

Which sentence describes the relationship shown on this scatter plot?

Accepted Answer

As the temperature increases, the number of visitors increases.

Answer

As the temperature decreases, the visitors increase.

Answer

As the visitors increase, the temperature decreases.

Answer

No correlation

Question 19

Which of the following could be a possible line of best fit for the data?

Accepted Answer

y = -5/2x + 20

Answer

y = -x + 19

Answer

y = x + 20

Answer

y = 2/3x + 15

Question 20

In the scatter plot, does the image shows a "Line of Best Fit"?

Accepted Answer

Yes

Answer

No

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