Question

if f(x)= -8x+4, then f^-1(x)=

Answer 1

Answer:

$f^{-1}$(x) = $\frac{4-x}{8}$

Step-by-step explanation:

let y = f(x) and rearrange making x the subject

y = - 8x + 4 ( add 8x to both sides )

8x + y = 4 ( subtract y from both sides )

8x = 4 - y ( divide both sides by 8 )

x = $\frac{4-y}{8}$

Change y back into terms of x

$f^{-1}$(x) = $\frac{4-x}{8}$