Scatter the TV sales over weeks. Pupils create a scatter plot to display the number of TV sales over a period of several weeks. The interactive allows class members to create two lines of best fit. Then they determine which line fits that data better and how to verify it.

Concepts

line of best fit, scatter plots, bivariate data, regression line, linear regression

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Additional Tags

math

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Instructional Ideas

• Conduct a lesson on finding residuals for a line of best fit

Classroom Considerations

• Learners should know how to graph a line written in slope-intercept form
• Requires signing up for a free CK-12 account

Pros

• Individuals can view the correct answer
• The supplementary material contains additional examples

Cons

• It can be difficult to drag the lines to create lines of best fit

Common Core

8.SP.A.2 8.SP.A.3 HSS-ID.B.6.a HSS-ID.B.6.b HSS-ID.B.6.c