Sharon,a Marketing Major,has Her First Economics Test and Her First

Multiple Choice

Sharon,a marketing major,has her first economics test and her first finance test to take tomorrow and she has four hours tonight to allocate to studying the two subjects.The data below show her scores on the two tests based on the time spent studying.(Hint: Studying economics for 0 hours means studying finance for 4 hours. )

-The cost of spending an extra hour studying economics is

A) falling.
B) the resulting test score in finance.
C) constant.
D) the resulting decrease in the finance test score.
E) missing an hour's worth of TV.