i know of none but it's not hard to create one using the drawing api. (see kglad.com,snippets,function graphs)
The animations on this site are very good! But I want to know how to make it and also my idea is when I enter a value for x and y the parabola can be drawn immediately. Can you explain me how to make this things ? or may be can you show me a tutorial abou that ?
use the drawing api. if you're using as2, check the movieclip moveTo, lineTo methods. if you're using as, check the graphics class moveTo and lineTo methods.