The function f(x)=5x+1 is one-to-one.

Question

Find an equation for f^-1(x), the inverse function.

 

f^-1(x)=

Answer 1

f(x) = 5x + 1

x = 5f^-1(x) + 1

x - 1 = 5f^-1(x)

(x - 1) / 5 = f^-1(x)