Final answer:
The total number of cups of coffee sold at a coffee shop follows exponential growth.
Step-by-step explanation:
The total number of cups of coffee sold at a coffee shop, represented by the function C(t), can be classified as exponential growth. Exponential growth occurs when the rate of growth, as a percentage or fraction, is constant. In this case, the number of cups of coffee sold is doubling every month, indicating exponential growth.