Line of Best Fit

The scatter plot shows the relationship between Marvin's age and the time it took him to run a mile.

Which statement best describes the relationship between Marvin's age and the time it takes him to run a mile?

• As Marvin's age increased, the time it took him to run a mile decreased.

• As Marvin's age increased, the time it took him to run a mile increased.

• As Marvin's age increased, the time it took him to run a mile remains constant.

• There is no relationship between Marvin's age and the time it took him to run a mile.

Choose the linear equation that best fit the data shown on the graph.

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What are the coordinates of the outlier?

• (1,9)

• (9,1)

• (2,2)

• y=x

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

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

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam? 

• 65

• 92

• 70

• 76

The number of calls a company received at the end of six weeks is shown in the table. Based on the line of best fit, how many calls should the company expect at the end of week 8?

• 75

• 110

• 96

• 91