Answer:
b
Step-by-step explanation:
let y = f(x) and rearrange making x the subject , that is
y = 4x + 3 (subtract 3 from both sides )
y - 3 = 4x ( divide both sides by 4 )
[tex]\frac{y-3}{4}[/tex] = x
Change y back into terms of x with x = [tex]f^{-1}[/tex] (x) , then
[tex]f^{-1}[/tex] (x) = [tex]\frac{x-3}{4}[/tex] → b
