Question

What is the inverse of the function f(x)=1/4x-12

Answer 1

f^-1(x)=4x+48



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Answer 2

Change it into a formula:

`y = (1)/(4) x - 12`
Change x and y and solve for y:


`x = (1)/(4) y - 12`
Remove the fraction by multiplying both sides by 4:

`4x = y - 48`
Then solve for y:

`y = 4x + 48`
The inverse is:

`{f(x)}^(-1) = 4x + 48`