The generalized demand function for good X is given by:

Q_d = 200 - 8P_X + 5P_Y - 3P_Z + 0.4M + 10N

Where Q_d = the overall demand for good X

P_X= the price of X

P_Y = the price of related good Y

P_Z = the price of related good Z

M = consumer per capita income

N = the number of consumers

1. The coefficient of P_Y shows that good Y and good X are ___, all other things being equal.

A. substitutes	C. independent
B. complements	D. related in terms of supply

1. The coefficient of P_Z shows that good Z and good X are ___, all other things being equal.

A. independent	C. related in terms of supply
B. substitutes	D. complements

1. The coefficient of M shows that good X is ______

A. an inferior good	C. a necessity
B. a luxury	D. a normal good but neither a necessity nor a luxury