PhET Blog

In the new #HTML5 Least-Squares Regression simulation, students can flexibly explore ideas related to correlation, best-fit lines, residuals, and outliers. Build a data set or use real-world data to discover the meaning of a correlation coefficient and determine when a linear fit is reasonable.

Least-Squares Regression is appropriate for any grade level that is studying scatter plots, best-fit lines, regression, or correlation, and is specifically aligned with Common Core State Standards in high-school mathematics.