The figure above shows the relationship between the time a student spends studying and the student's GPA that semester. The slope of the relationship at point A equals

If the same basket of goods costs $400 in the United States and 200 pounds in Britain, then according to the purchasing power parity theory,

a. goods and services must cost half as much in Britain as in the U.S. b. the exchange rate should approach $2/pound c. the exchange rate should approach $0.50/pound d. goods and services must cost twice as much in Britain as in the U.S. e. we cannot say anything about prices in the two countries unless we know the exchange rate

The Constitution of the United States says nothing about state economic activity.

A. True B. False C. Uncertain