The demand for good X is estimated to be Qxd = 10, 000 ? 4PX + 5PY + 2M + AX, where PX is the price of X, PY is the price of good Y, M is income, and AX is the amount of advertising on X. Suppose the present price of good X is $50, PY = $100, M = $25,000, and AX = 1,000 units. Based on this information, we know that the demand for good X is:
A. inelastic.
B. elastic.
C. unitary elastic.
D. neither elastic, inelastic, nor unitary elastic.
Answer: A
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