Two-dimensional scatterplots are often used to compare two sets of data and to see whether there is any relationship, or correlation, between the data.
In "Judgment Day," Charlie shows FBI agents a scatterplot of data from their case files in order to quickly see which cases are relevant to their current investigation and which are not. By looking at where and how the data is spread on the graph, Charlie may find a rule or pattern that describes this cluster of data.
Before the Activity
Download the attached PDF and look over the Teacher Page.
During the Activity
Discuss the materials from the Student Page with your class.
After the Activity
Encourage students to explore web sites and questions from the Extensions page.