Which situation(s) could by modeled by a linear function?
I. You have an assignment due and your teacher deducts 2 points for each day the assignment is turned in after the due date.
II. A car depreciates at a rate of 15% per year.
III. A bicyclist travels at a constant rate of 25 miles per hour for 30 minutes. She stops for 10 minutes and then travels at a constant rate of 30 miles per hour for 15 minutes.
O I only
O II only
O III only
O I and III only