Question

Don paid $1,000 on a down payment for a car. His monthly payments are $330. Which of the following functions represents the total cost, C, after x months? [8.F.4]

Answer 1

The equation should generally look like this:
f(x)=1000+330x
1000 is the fixed cost and 330 has a variable of x, as $330 must be paid monthly (time is continuous, so the amount will vary after a number of different months).