Scatter Plot - Line of Best Fit

• positive trend
• negative trend
• no trend

• positive trend
• negative trend
• no trend

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 line is line of best fit for the data?

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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 are the coordinates of the outlier?

• (1,9)

• (9,1)

• (2,2)

• y=x

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

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

• 25 hours

• 35 hours

• 45 hours

• 15 hours

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20

• y = -x + 19

• y = x + 20

• y = 2/3x + 15