Scatterplots and Trend Lines Review

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

• A

• B

• C

• D

Which line appears to fit the data better?

• line A

• line B

If m = -3/4 and b = 9, what is the equation of the trend line in y= mx + b?

• 0 = -3/4 (9) +9

• y = -3/4 x + 9

• y = -3/4 x - 9

• y = 3/4 + 9

The scatterplot shows the temp, in degrees, outside a house every hour for 10 hours.

Estimate the temp after 13 hours based off the trendline.

• 57.5

• 50

• 10

• 13

• 61.5

• 315

• 472.5

• 321

• 324

440 turtles

• 440 turtles

• 40 turtles

• 150 turtles

• 90 turtles

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, after how many days should Sammy predict to have 10 comic books left?

• 8

• 0

• 9

• 2

Which describes the scatterplot?

• As speed increases distance decreases.

• As speed increases, distance increases.

• As speed decreases distance increases.

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, how many comic books should Sammy have left after 6 days?

• 15

• 10

• 30

• 8

Match the scatter plot to the equation that could represent the equation of its trend line.

• y = 3x

• y=4x-2

• y = -x + 5

• y = -5x

• The relationship is not linear