Interactive tool: Curve fitting functions to data points (PhET / UCBoulder)

Posted on August 26, 2010 by


Interactive tool for fitting a straight line or other curves to data points. Great supplement to any science lab course. Let’s you see how data and mathematical models relate to each other.

With your mouse, drag data points and their error bars, and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, cubic, or quartic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.



PhET is a collection of online science and math simulations sponsored by the University of Colorado, Boulder. They can be run from any web browser provided Java/and or Flash are installed on your local computer.