This is aboutJSXGraphHow to get started.
(Under continuous improvement)
This tutorial covers the basics, how to build simple charts, and some advanced topics such as how to use JSXGraph in Moodle.
To build the JSXGraph, you don't need to be a programmer (although that helps), it's more like stacking elements together in a build.
Here's an example that shows JSXGraph's appeal.
Tip: Move the point control and watch.