Scatter Plots and Predicting Values

What is the correlation between length of running start and distance of jump?

• positive:  the further you run the further you jump

• negative: the less you run the less distance of your jump

• positive: the further your running start the less your distance

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 pages would be in a book with 6 chapters. 

• ≅100 pages

• ≅170 pages

• ≅60 pages

• ≅20 pages

• This residual graph represents a linear fit.
• This graph represents a nonlinear fit.
• This residual graph represents no fit.

• This residual plot represents a linear fit.
• This residual plot represents a nonlinear fit.
• This residual plot represents no fit.

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

• Yes

• No

Based on this scatter plot, a student with 6 absences should get approximately what score on the final exam? 

• ≅ 58

• ≅ 92

• ≅ 100

• ≅ 76

From the graph, (1, 95) is an example of:

• Interpolation

• Extrapolation

• An outlier

Write the equation of the trend line.

• y = 0.50x

• y = 0.50x + 30

• y = 0.10x + 30

• y = 10x + 30

Predicting the attendance given a ticket price of $27.50 is an example of:

• Interpolation

• Extrapolation

• An outlier

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A

• B

• C