Answer:
A
Step-by-step explanation:
The equation representing a proportional relationship is
y = kx ← k is the constant of proportion
The only equation in this form is
y = 24x ( k = 24 ) → A
Answer: Product of powers
---
The product of powers rules basically says that two powers, let's call them

and

, with the same base (a) multiplied together equals

.
In your problem you can see that

and

are being multiplied together and the exponents are being added, which is what the "product of powers" law says.
We assume you intend that cars shipped to Japan are modeled by
j(n) = 2·3^(n-1)
and that those shipped to Vietnam are modeled by
v(n) = 5 + 11·(n-1)
The value of j(n) will exceed the value of v(n) in
month 4.