a. Find -1 (x). b. Graph and -1 together. c. Evaluate d/dx at x

a. Find ƒ^-1(x).

b. Graph ƒ and ƒ^-1 together.

c. Evaluate dƒ/dx at x = a and dƒ ^-1/dx at x = ƒ(a) to show that at these points dƒ^-1/dx = 1/(dƒ/dx).

ƒ(x) = (1/5)x + 7, a = -1