Answer:
i think f(9)=2/3
Step-by-step explanation:
f(9) = 5
f(x) = 2/3 x - 1; f(9)
f(9) = 2/3 x - 1
= 2/3 × 9 - 1
= 2 × 3 - 1
= 6 - 1
-TheUnknownScientist
