can there be a module in Ejs that allow student to initiative inquiry of variables on the plotpanel?

[img]http://www.phy.ntnu.edu.tw/ntnujava/index.php?action=dlattach;topic=1526.0;attach=1899;image[/img]

i am trying to create a Kepler applet where students decide intelligently and self directly to investigate T*T versus r*r*r which is a straight line.
reference:
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1501.0

I don't think i have seen any Ejs applet that has it.

chance to help?