Here I used 1.16 as an Exponent - ( Scroll in and out with Mouse, to clear Graphics, when button is in the Stop Position, please. )[br][br]1) Notice when you type in the prescribed values which numbers are shown for variables a, c, d, e. [br][br]2) Press Play at Bottom Left to see Design (I guess make design first, then, when 'Stop Play' is 'checked' go ahead and check the values to see b & c.)[br][br]3) I made it a little interesting by making the two points to be masses that orbit each other.