I think it’s either 8 or negative 8
as x increases, y increases and as x decreases, y decreases-and that the ratio between them always stays the same.
Answer:
f (x) = -60x + 500
Step-by-step explanation:
After 1 month : 500 - 40 x 1
After 2 month: 500 - 40x 2
After 3 month: 500 - 40 x 3
After x month: 500 - 40x
Therfore: f (x) = -40x + 500.. xe[0,8]
{500 - 40x > , 0 }
x ≤ 8
