Note to Students and Teachers:
This applet gives practice in identifying the coefficients in the equation of a parabolic graph.
By experimenting with the sliders one may be able to infer what aspect of the graph corresponds to each of the parameters - or to reinforce existing knowledge by concrete experience. Intercepts, slope (at x=0), and curvature all play a role.

Note to Developers: The link provided above is to a version that should run in most browsers.
A new version built with the new GeX component library is also available - but with no real advantages aside from its simpler code. In fact the overhead of working in terms of well defined and flexible components sometimes slows things down a bit, and examples like this serve as a testbed for maintaining the efficiency of the component-built applets.