Posted by Steve on .
If P(400)=900 Rewrite this Equation in terms of p^1

Math(Anyone Please) 
MathMate,
By definition of the inverse,
if y0=P(x0), then P^{1}(y0)=x0
Do you now see the parallel with your question?
You can also read more about inverse functions here:
http://en.wikipedia.org/wiki/Inverse_function