What is the inverse of the function below? f(x) = x – 4

a. f –1(x) = x – 4

b. f –1(x) = –x – 4

c. f –1(x) = –x + 4

d. f –1(x) = x + 4

Step-by-step explanation:

f(x) = x- 4

To find inverse function , we replace f(x) b y

y = x- 4

Replace y with x  and replace x  with y

x = y - 4

Now we solve for y

x = y - 4

Add 4 on both sides

x + 4 = y

Now we replace y with f^-1(x)

Inverse of function f(x) = x-4  is f^-1(x) = x+ 4