Answer:
f^-1(x) = 1 -(x/3)
Step-by-step explanation:
To find the inverse function, solve for y:
x = f(y)
x = -3y +3
x/-3 = y -1 . . . . divide by -3
1 -(x/3) = y . . . . add 1
The inverse function is ...
or
f^-1(x) = (3-x)/3
