Question 147272
c)
~
a*y = b*x + c with constants a, b, and c
Inverse: y = (a/b)x - (c/b)
~ example: 
f(x) = 3x - 9
a = 1, b = 3, and c = -9
y = (1/3)x + (9/3)
y = (1/3)x + 3