Question 762478
f(x) = 4x-8


y = 4x-8


x = 4y-8


x+8 = 4y


(x+8)/4 = y


y = (x+8)/4


y = (1/4)x+8/4


y = (1/4)x+2


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


This is a linear equation. So the domain is <font color="red">D. All real numbers</font>