B. profits produced by the employment of an extra worker.
C. cost of producing one extra unit of output.
D. price received from selling one extra unit of output.
In the following question you are asked to determine, other things equal, the effects of a
given change in a determinant of demand or supply for product X upon (1) the demand
(D) for, or supply (S) of, X; (2) the equilibrium price (P) of X; and (3) the equilibrium
quantity (Q) of X.
An increase in the prices of resources used to produce X will:
A. increase S, increase P, and increase Q.
B. increase D, increase P, and increase Q.
C. decrease S, decrease P, and decrease Q.
D. decrease S, increase P, and decrease Q.
The income elasticity of demand for a food is unity. A consumer’s monthly income is
$2,000, of which 20 percent is spent on food. If income doubles, the amount spent on
food will be:
A. $400 per month.
B. $500 per month.
C. $800 per month.