multiple choice question\nhow is a buyers responsiveness to price changes measured?\nby the price elasticity…

Brief Explanations:

The price elasticity of demand coefficient measures how much the quantity demanded by buyers changes in response to a change in price. It shows buyer responsiveness to price changes. The price - elasticity of supply coefficient measures seller responsiveness to price changes. The level to which demand shifts as incomes change is related to income elasticity of demand. The behavior of firms' production is not related to buyer price - responsiveness.

Answer:

By the price elasticity of demand coefficient