Question

#11: Marketa is paying off her $15,000 car loan at a rate of

$200 per month. If Marketa wants to create a function to
determine the amount of money she still needs to pay off
based on the month, should her rate of change be positive or
negative? Why? (You MUST EXPLAIN to get full credit)

Answer 1

The rate of change in Marketa's car loan balance should be negative, because she is paying off the loan over time. This means that the balance will decrease each month as she makes payments.

Explanation:

For example, if Marketa has been paying off the loan for 3 months and the function is called with the argument 3 (for the number of months), the function should return the balance after 3 months of payments. This balance will be lower than the original balance of $15,000, since Marketa has been making payments of $200 per month. The rate of change in the balance is therefore negative.