Which equation can be simplified to find the inverse of y = x2 - 7?

a: x=y ^ 2 - 1/7

b: 1/x = y^2 - 7

c: x = y^2 - 7

d: - x = y^2 - 7

To find the inverse of the function you can just exchange the name of the variables, change x for y and y for x ...

original (direct) function: y = x^2 - 7

inverse function x = y^2 - 7

Then, the answer is the option c.