Question

What is the inverse of the function f(x)=4x+8

Answer 1

Switch the x and y

X= 4y +8

Subtract 8 from both sides

X-8 = 4y

Divide both sides by 4

So,

f^-1(x)= x-8/4

Answer 2

Step 1: change f(x) to y
y = 4x + 8

Step 2: switch x and y in the equation
x = 4y + 8

Step 3: solve for y
x - 8 = 4y

`(x)/(4) -2=y`

`f^(-1) (x)= (x)/(4)-2`