Answer:
f(9)=1
Step-by-step explanation:
This questions asks us to find f(9).
It is asking us to find what f(x), or y is, when x is equal to 9.
f(x)=x-8
Therefore, we can substitute 9 in for every x.
f(9)=9-8
Subtract 8 from 9
If f(x)=x-8, then f(9)=1
plug in 9for x
9-8 =1
