Scatterplots Trendlines

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

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is NOT a line of best fit because it does not pass through two points.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

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 scatterplot shows the relationship between the number of tickets bought and the amount of money spent buying tickets.  Which would be a reasonable prediction for the cost of buying 6 tickets?

• $8

• $15

• $12

• $10

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

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. 

Describe the association of the scatter plot

• Linear; positive association

• Linear; negative association

• Non-linear