Question

Which of the following expressions is the inverse of the function y = x - 2 over 3?

Answer 1

To find the inverse, you can either do this:

y=(x-2)/3      *switch x and y

x=(y-2)/3      *multiply 3 on both sides

x(3)=((y-2)/3)(3)     *the three cancels out on the right side

3x=y-2         *add the 2 on both sides

3x+2=y-2+2      *simplify

Final answer should be : 3x+2=y (inverse)