Two large circles have the same radius.[br]Inside each circle, a shaded disk changes size in some simple fashion.[br][br]"Simple Fashion" means some size parameter changes at a constant rate. However what is "simple" for Blue may not be simple for Green.

Animate the size changes. Try to identify what aspect of the Blue disk changes at a constant rate AND try to do the same for the Green disk.[br][br]After doing those identifications for both disks, then write plausible functions for each disk that compute "standard size parameters" as functions of a time variable.