Change it into a formula: [tex]y = \frac{1}{4} x - 12[/tex] Change x and y and solve for y:
[tex]x = \frac{1}{4} y - 12[/tex] Remove the fraction by multiplying both sides by 4: [tex]4x = y - 48[/tex] Then solve for y: [tex]y = 4x + 48[/tex] The inverse is: [tex]{f(x)}^{-1} = 4x + 48[/tex]
