Question

What is the inverse of f(x)= x over 3 -1?
f^-1(y)=?

Answer 1

\[f(x)=\frac{x}{3}-1\]
\[f^{-1}(x)=3(x+1)=3x+3\]\]

Answer 2

first function says divide by 3 then subtract 1. inverse say add 1 then multiply by 3

Answer 3

method is write
\[y=\frac{x}{3}-1\] and solve for x. i see your question asks for
\[f^{-1}(y)\] so we will leave it at that

Answer 4

\[y=\frac{x}{3}-1\]
\[y+1=\frac{x}{3}\]
\[3(y+1)=x\]
\[f{-1}(y)=3(y+1)=3y+3\]