Scatterplot and Line of Fit Review

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

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

Which of the following best models a linear function fitted to the data in the scatter plot?

• 
• 
• 
• 

According to the trend line, if someone runs 3 miles each week, what % body fat might they have?

• 24

• 21

• 18

• 15

According to the tend line, if someone has an 80% as a math score, what might they have for their science score?

• 60%

• 70%

• 80%

• 90%

According the the trend line, if a baseball player has 12 swings, what would be the number of hits?

• 4

• 5

• 6

• 7

Imagine the trend line continues. If a baseball player has 16 swings, what would be the number of hits?

• 7

• 8

• 9

• 10

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades. 

Which trend line is the best model for the data?

• Line A

• Line B

• Line C

• None of the above