Bathtub Water Levels—Least Squares Regression

This Bathtub Water Levels—Least Squares Regression lesson plan also includes:

Wash away any misunderstandings about linear regression. Young mathematicians collect data on bathtub water levels and plot their data. The result should be a negative linear regression line.

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Instructional Ideas

  • Have learners collect data at home in their bathtubs or use a sink to collect data in class
Classroom Considerations

  • Pupils should know how to graph data on a coordinate plane
  • Builds on information from the previous lesson (this is the second of nine lessons in the Least Squares Regression unit)
Pros

  • Includes recording sheets for the activity
  • Provides a data set if bathtub data collection is not possible
Cons

  • None