Question

100
O () = 97 +18
or()- +2
x= +
OF (x) = 97 +2
F(x) = -27 + -
10

Answer 1

first option

Explanation:

let y = f(x) and rearrange making x the subject

y =
`(1)/(9)` x - 2 ( add 2 to both sides )

y + 2 =
`(1)/(9)` x ( multiply through by 9 to clear the fraction )

9y + 18 = x

change y back into terms of x with x =
`f^(-1)` (x) , then

`f^(-1)` (x) = 9x + 18

Answer 2

9x+2

Explanation:

the inverse of the function is the opposite. 1/9 becomes 9 and negative 2 becomes positive 2