Question

given f(x)=3x-7 what is f^-1(x)?
A) 3x+7
B) -3x+7
C) (x+7)/3
D) (x/3)+7

Answer 1

inverse is switching the x and y around

Answer 2

\[f(x) = 3x - 7\]
\[f^-1(x) = 3y - 7\]
\[x = 3y - 7\]
\[x + 7= 3y\]
\[(x + 7)/3= y\]

Answer 3

thanks!