Purpose: This lesson is designed for 8th grade students to explore scatter plots.

Prior to the lesson have students work in groups 4 to collect data on 20 people on one of the following topics: number of hours people work and their salaries, amount of hours high students study and their GPA, student’s arm span and their heights.

Give students a worksheet of a scatter plot about the population growth from 2000-2004, have the students answer the following questions.

What was Washington’s percentage growth from 2000 to 2004? _________

What other information can be given for point labeled Washington? _________

Which state had the largest population growth by July of 2004? _________

What information can be given from a data point? _____________________________________

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Write a statement about North Dakota? ____________________________________________

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Discuss the responses with the students. Discuss and explain the following term using the scatter plot above: data point, scatter plot, cluster, outlier.

Explain to the students that they will be creating scatter plots using the information they collected from the survey they completed with their group. Have the students use the Excel application on their computers to enter the information they collected from their survey. Guide students through creating a scatter plot in Excel.

Discuss with students how a scatter plot shows a relationship between two sets of data. Have students identify the outliers, and the clusters with the scatter plot. Next have the students write a brief statement about the data based on the scatter plot.