All normal goods have A. income elasticities of demand greater than 1.0. B. price elasticities of demand greater than 1.0. C. negative price elasticities of demand. D. positive income elasticities of demand.

1. Suppose the price elasticity of demand for good air travel is -1.5.  Which of the following is a proper interpretation of the price elasticity of demand.   a For every 1% increase in the price, the quantity of air travel purchased will increase 1.5% b For every 1.5% increase in the price, the quantity of air travel purchased will increase 1% c For every 1% increase in the price, the quantity of air travel purchased will decrease 1.5% d For every 1.5% increase in the price, the quantity of air travel purchased will decrease 1% 2. Suppose that Frank's income increased from $4,000/month to $4,500/month and as a result, the quantity of good X he purchased increased from 15 units/month to 16 units/month. In this case, good X is _____.   a an inferior good b a normal good and a necessity c a normal good and a luxury d none of the above

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