Integration Statistics: Scatter Plots and Best-Fit Lines

These web-based activities were developed, during summer sessions from 1997 through 1999, by students at Mainland High School, located in Daytona Beach, FL. As part of Mainland's CCTT grant, the students were given permission by the book's publisher to convert the ancillary materials of the County's adopted Algebra 1 textbook (Glencoe Algebra 1 — ISBN: 9780028253282) into html format.

Which graphs show a correlation between the variables? If there is a correlation, is it positive, negative, or not possible to tell?

The average California Achievement Test scores in mathematics and science for Wesley High School sophomores from 1985 to 1989 are given in the table at the right.

7. Make a scatter plot of the data using the coordinate plane provided.

8. Does the scatter plot show a positive or negative correlation?

9. Predict the mathematics score corresponding to a science score of 50.

10. Predict the science score corresponding to a mathematics score of 65.