Anewly introduced fitness program is gaining popularity among the members of a fitness club. the number of members, s(t), who joined the program t months after it was introduced is modeled by the function below.

s(t)=kt

Step-by-step explanation:

If number of members increased directly as the number of months increases then both terms are directly proportional:

      s(t) ∝ t

      s(t) = kt

where k is constant of proportionality.