This lesson is optional. It gives students an opportunity to put into practice what they have learned from this unit, but it may be safely skipped if short on time. For timing, it may be helpful to select one of the two activities to do with students. The first activity focuses on measuring to collect data, and the second activity has students research data they can find online.

The mathematical purpose of this lesson is for students to collect, summarize, interpret, and draw conclusions from bivariate data using scatter plots, best-fit lines, residuals, and correlation coefficients.

Technology isn’t required for this lesson, but there are opportunities for students to choose to use appropriate technology to solve problems (MP5). We recommend making technology available. When students collect and analyze data to answer a question, they are making sense of problems and persevering in solving them (MP1).