Answer:
2=A
Explanation:
We know that F is directly proportional to A then the equation relating them is
F = kA ← k is the constant of proportion
To find k use the condition F = 36 when A = 9, then
36 = 9k ( divide both sides by 9 )
4 = k
F = 4A ← equation of proportion
When F = 8, then
8 = 8A ( divide both sides by 4 )
2 = A