Answer:
C(X) = 25 + 2x
Explanation:
Hello,
John collects vintage baseball cards,
He already has 25 and he collects 2 cards every month.
In x month, he would have
X = 25 + 2x amount of cards
For instance, in 4 months, he would have
X = 25 + 2(4) = 25 + 8 = 33 cards
25 in the equation is a constant since he already has that in stock before considering or calculating what he gets monthly to increase his number of cards.