Scatterplot Lines of Best Fit

What is the equation of the line of best fit?

• y = -25x + 170

• y = -5/8x + 170

• y = 25x + 170

• y = 5/8x + 170

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

What type of association (correlation) does this graph have?

• positive

• negative

• none

• all of the above

which scatterplot shows the correct trend line (line of best fit) for the relationship showing the number of bags of chocolates that are sold and the price per bag?

• A

• B

• C

• D

Which scatterplot shows the correct trend line (line of best fit) for the relationship shown?

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.EE.B.5

which scatterplot shows the correct trend line (line of best fit) for the relationship showing the number games played and attendance in the Small Fry Baseball Tournament?

• W

• X

• Y

• Z

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

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

A line of best fit used for

(Choose all tht apply)

• To make predictions

• To connect the points

• To make the graph look pretty

• To make it look like you know what you are doing

which scatterplot shows the correct trend line (line of best fit) for the relationship showing the number of Visitors of a library and the number of books checked out?

• W

• X

• Y

• Z