A company that makes an exercise machine asked some of its recent customers how long they have owned their machines and how many hours per month they currently use their machines. Which of the following is the best estimate of the average change in hours of exercise per month that was associated with a 1 month increase in ownership?
A.
-5 hours
B.
-3 hours
C.
-3/4 hours
D.
-1/3 hours