Question

F(x) = 8x + 1
f^-1(x)

Answer 1

f^-1(x) = 1/8x+1 (an inverse power is the reciprocal of the function raised to the indicated value)

Answer 2

(x+1)/8 = f^-1(x)

Explanation:

switch x and y (aka f(x) )

x=8y+1

solve for your new y

(x+1)/8 = y