Simplest

The graph to the right is the simplest form this applet can take.

To put an applet like this in your webpage is straightforward.
Something like the following is all you need:

<applet codebase=../classes/ code=GraphApplet.class width=260 height=260>
<param name=function1 value="3*x^2">
</applet>

A master document to make your own pages can be found in the directory mypages. Click master.htm to open that document.