Question

if
f(x) = 3x + 1 and f^-1 = x-1/3 ,
then f^-1(7) =
A . 22
B . 2
C . -2

Answer 1

B

You can find it by plugging 7 in for x in the f^-1(x).  so, 7-1/3
6/3
2