Swing and a miss, I'm afraid. If two things are equal the graph is a straight line. Try graphing f(x)=x. It's the same thing as y=1x+0 which is linear. A circle is quite impossible, as you can have multiple x-values for the same y-value but not the reverse. Thus the revelation about the nature of time: it's a cyclical and warped relationship with itself. More research must be done on the subject :)