Refer to the Following

Multiple Choice

refer to the following:
The estimated demand for a good is

where Q is the quantity demanded of the good, P is the price of the good, M is income, and is the price of related good R.
-This good and good R are

A) complements since the coefficient on M is negative.
B) substitutes since the coefficient on M is negative.
C) complements since the coefficient on

Is negative.
D) substitutes since the coefficient on

Is negative.
E) none of the above