基礎ECON-ELAS-001
Which of the following correctly defines price elasticity of demand?
A. Percentage change in quantity demanded divided by percentage change in price✓ 答案
B. Change in quantity demanded divided by change in price
C. Percentage change in price divided by percentage change in quantity demanded
D. Change in total revenue divided by change in price
解說
Price elasticity of demand measures responsiveness of quantity demanded to a price change, calculated as %ΔQd / %ΔP. Option B is the slope of the demand curve, not elasticity. C is the inverse (elasticity of price with respect to quantity). D is unrelated to elasticity.