Less is best when looking at residuals. Scholars use an interactive to informally fit a linear regression line to data on a scatter plot. The interactive provides a correct best fit line with residuals and correlation coefficient to check their answers.

Concepts

linear regression, regression analysis, correlation, residuals, data analysis, outliers

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Additional Tags

math

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Instructional Ideas

• Have the class research real-world data sets to use in the activity
  

Classroom Considerations

• Be sure computers meet the software requirements listed in the resource
• Teachers may need to create an account to access the tips sheet
  

Pros

• Provides 10+ sets of sample real-world data to use
  
• Includes several lesson plans created by teachers
  

Cons

• None

Common Core

8.SP.A.1 8.SP.A.2 8.SP.A.3 HSS-ID.B.6.a HSS-ID.B.6.b HSS-ID.B.6.c HSS-ID.C.8