If the point (2, 5) is on the graph of the function f, then the point (x, y) = (?) is on the graph of f −1.

Question

Need help finding the inverse!

Answer 1

Since f(2) = 5, f^-1(5) = 2.

 

In other words, if (2,5) is on the graph of y = f(x), then (5,2) is on the graph of y = f^-1(x).