An Informal Approach to Linear Least Squares

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James Quinlan


Modeling data using the least squares method is used extensively in practice, and is therefore an essential topic for students of data science. This paper describes a GeoGebra applet used to facilitate understanding of the objective and the underlying mathematics of the least squares method. Additionally, lists, one of the most robust and valuable GeoGebra features is highlighted through the use of the Sequence command. The discussion includes ideas for enhancing the applet.

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Author Biography

James Quinlan, University of New England

Department of Mathematical Sciences