Reasonable Fit Data Predictions

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 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

What is a line of best fit 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

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

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

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?  (a)  

• 65

• 92

• 70

• 76

y = 1.45x + 22

y = -2x + 15

y = 1.33x + 30

y = -1.5x + 24

• y = 1.45x + 22

• y = -2x + 15

• y = 1.33x + 30

• y = -1.5x + 24

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

• Yes

• No

Tags

CCSS.8.EE.B.5

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

• 25 hours

• 35 hours

• 45 hours

• 15 hours

• 30 hours

Tags

Statistics

Scatter Plots

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?

• A. 50 min

• B. 80 min

• C. 45 min

• D. 60 min

Tracy and her family moved to the city in 2003. Use the equation to predict how many retail stores there were in 2003. 

• 173

• 155

• 143

• 36

Based on the trend in the data, approximately how many free throws would a player be expected to make if he attempted 60 free throws?

• 50

• 35

• 25

• 60