Final answer:
The formula that relates to this situation is Annuity: Future value.
Step-by-step explanation:
The formula that relates to this situation is Option C: Annuity: Future value.
An annuity is a series of equal payments made at regular intervals. In this case, Monique is repaying $300 every month. The future value refers to the total amount that will be accumulated or repaid at the end of a certain period. Monique will take 6 years to pay off the loan, and by using an annuity formula, we can calculate the future value of the loan.