contestada

The estimated demand for a good is Q = 3,600 - 12P + 0.6M - 2.5PR where Q is the quantity demanded of the good, P is the price of the good, M is income, and PR is the price of related good R. The coefficient on P:

a. should not have the same sign as the coefficient on PR .
b. should not be greater than one (in absolute value).
c. is negative as dictated by the law of demand.
d. violates the law of demand.