MathGraph

MathGraph is an easy way to display mathematical functions on your website.
GitHub

This example displays functions x³+3x²-9x-12 and 4x+3.
Click on a function-line to view info in the point. Escape-key clears the view.
It uses HTML5 Canvas and require a newer version of a major browser to work.

MathGraph requires Canvas. Your browser is outdated.