Inverse functions

Question

f(x) is transformed to x=f(-y), is it equal to (-y,x) or (y,-x)?

Answer 1

The inverse point will be (-y,x).

This is because the original equation is y=f(x) and the new equation is x=f(-y). You can see that in place of the original y there is now and x, and in the place of the original x there is a -y. Now make a point with the new x,y values which are (-y,x).