Question

What is the inverse function of dx) = 2x - 4?

Answer 1

y = x/2 + 2

Explanation:

y = 2x - 4

swap y and x

x = 2y - 4

x + 4 = 2y

x/2 + 2 = y

Answer 2

d(x) = 1/2x + 2 or d(x) = (x + 4)/2

Explanation:

y = 2x - 4

y + 4 = 2x

(y + 4)/2 = x

y = (x + 4)/2 or y = 1/2x + 2