Pat Has 4 Hours to Spend Either Studying for a Test

Multiple Choice

Pat has 4 hours to spend either studying for a test or playing a new video game. If Pat spends all of that time studying, Pat can score a 92 on the test. If Pat plays for 1 hour, Pat's test score falls 5 points. For playing a second hour, Pat's score falls by another 7 points. Playing for a third hour will lower Pat's score by another 10 points. Refer to the information above. Pat's PPC for test score versus hours playing a new video game is:

A) upward-sloping.
B) downward-sloping.
C) first upward- and then downward-sloping.
D) first downward- and then upward-sloping.