Question 728488
f(x) = 3x + 2


y = 3x + 2


x = 3y + 2


x - 2 = 3y


x/3 - 2/3 = y


y = x/3 - 2/3


y = (1/3)x - 2/3


So the inverse function is <img src="http://latex.codecogs.com/gif.latex?\large f^{-1}(x) = \frac{1}{3}x - \frac{2}{3}" title="\large f^{-1}(x) = \frac{1}{3}x - \frac{2}{3}" />