Based on the percentage change in price and the percentage change in the quantity demanded for newspapers, demand is elastic.
Price elasticity of demand measures the responsiveness of quantity demanded to changes in price of the good.
Price elasticity of demand = percentage change in quantity demanded / percentage change in price
Price elasticity of demand = 8/4 = 2
Demand is elastic when the coefficient is greater than one, it means demand is elastic. Elastic demand means that quantity demanded is sensitive to price changes.
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