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Least Squares Regression



This manipulative provides opportunities to:

  • Move and add data points in the custom mode, and view the changing correlation coefficient

  • Work with different data sets

  • Attempt to find a line of best fit

  • View residuals and squared residuals

PhET also provides translated versions of the simulation in multiple languages, teacher created activities, and with a free account you can access their teaching resources.

What are your thoughts on this virtual manipulative? Do you have experience using it in your classroom? Please support others by rating this virtual manipulative and sharing feedback in the comments section below.

Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC-BY-4.0 (

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