If consumers completely cease purchasing a product when its price increases by any amount, then demand is: A.perfectly inelastic. B.unit elastic. C.inelastic. D.perfectly elastic. 正确答案：perfectly elastic.

If the demand curve is horizontal, then demand is: A.perfectly elastic. B.elastic. C.unit elastic. D.perfectly inelastic. 正确答案：perfectly elastic.

If a demand curve is horizontal at P = $5, then the price elasticity of demand is: A.0.2. B.0. C.infinite. D.5. 正确答案：infinite.

For any horizontal demand curve, the price elasticity of demand is: A.equal to the price of the good. B.1. C.0. D.infinite. 正确答案：infinite.

If the percentage change in quantity demanded is zero for any percentage change in the price of the good, demand is classified as: A.inelastic. B.perfectly elastic. C.perfectly inelastic. D.unit elastic. 正确答案：perfectly inelastic.

If the slope of a demand curve is infinite, then the price elasticity of demand is: A.zero. B.infinite. C.equal to the price of the good. D.one. 正确答案：zero.

A demand curve that is drawn as a vertical line has a price elasticity of demand equal to: A.1. B.0. C.infinity. D.the quantity. 正确答案：0.

If the demand curve for open-heart surgery is vertical for people with serious heart conditions, then the demand for open-heart surgery is __ with respect to price. A.perfectly elastic B.perfectly inelastic C.inelastic D.unit elastic 正确答案：perfectly inelastic

If the demand curve for a good is a vertical line at Q = 1, then a decrease in the price of that good will: A.increase the quantity demanded. B.decrease the quantity demanded. C.lead the quantity demanded to fall to zero. D.not change the quantity demanded. 正确答案：not change the qu … 阅读详情>> "If the demand curve for a good is a vertical line at Q = 1, then a decrease in the price of that good will:"

A perfectly elastic demand curve has a slope of _ while a perfectly inelastic demand curve has a slope of _. A.0; 1 B.infinity; 0 C.0; infinity D.1; 0 正确答案：0; infinity

When the price of insulin is $10, consumers demand 100 units; when the price is $15, consumers demand 100 units; and when the price is $20, consumers demand 100 units. Based on this information, the demand for insulin is: A.elastic B.unit elastic C.perfectly elastic D.perfectly i … 阅读详情>> "When the price of insulin is $10, consumers demand 100 units; when the price is $15, consumers demand 100 units; and when the price is $20, consumers demand 100 units. Based on this information, the demand for insulin is:"

Refer to the figure below. Let εX denote the price elasticity of demand at point X. Which of the following describes the relationship between εA, εB and εC? A.εB> εC> εA B.εA> εB> εC C.εA> εC> εB D.εC> εB> εA 正确答案：εA> εC> εB