The price elasticity of demand for apples is -3.4. If the price of apples rises by 5%, the quantity demanded of apple is expected to change by [Answer]%.
Price elasticity measures the responsiveness of quantity to a change in the price, other things remains constant.
As the price and quantity is inversely related, the price elasticity is always negative. It is calculated by the following formula
Price Elasticity = change in quantity in / change in price in percentage
In the question, elasticity is given as -3.4
Price of apples rises by 5%
How much the quantity demanded changes?
When price rises, the quantity demanded falls.
-3.4 = % change in quantity / % change in price
-3.4 = % change in quantity / 5%
% change in quantity = -3.4 * 5 = -17%
In otherword, the quantity demanded falls by 17%.
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