試題詳解

2. If a 6 percent increase in income results in a 6 percent decrease in the quantity demanded of pizza, then the income elasticity of demand for pizza is
(A) 1, and therefore pizza is a normal good.
(B) 1, and therefore pizza is an inferior good.
(C) －1, and therefore pizza is an inferior good.
(D) －1, and therefore pizza is a normal good.