Answer:
[tex]f ^{ - 1} (y) = \frac{y + 3}{2} [/tex]
Step-by-step explanation:
put y for f(x)
[tex]y = \frac{1}{2} x - 3[/tex]
[tex]y + 3 = \frac{1}{2} x[/tex]
[tex] \frac{y + 3}{2} = x[/tex]
[tex]x = \frac{y + 3}{2} [/tex]
