If the line fits, use it. Using a Geogebra interactive, pupils plot points and try to find the best fit line. They assess the linear fit by analyzing residuals. A radio button allows participants to show the regression line and the plotted residuals.

Concepts

scatter plots, linear regression, correlation, linear modeling, data analysis, data representations

Show More Show Less

Additional Tags

math

Show More Show Less

Instructional Ideas

• Provide a short lesson on using residuals to assess the fit of a linear function
• Lead a discussion on ways to find a best-fit line other than eye balling it

Classroom Considerations

• The class should understand how to eye-ball a best-fit line

Pros

• Lets users move the line incrementally
• The user can enter their own points or let the resource randomly generate them

Cons

• None

Common Core

HSS-ID.B.6.a HSS-ID.B.6.b MP4 MP5 MP6