A price change causes the quantity demanded of a good to increase by 20 percent, while the total revenue of that good increases by 15 percent. Is the demand curve elastic or inelastic? Explain.
Quantity demanded of a good increase by 20 % due to change in price.
It means there is decrease in price because quantity demanded increase.
And total revenue is also increase.
It conclude that price decrease causes a increase in total revenue. This is happened when demand is elastic (price change and total revenue are negatively related).
Note: In case of elastic demand price change and total revenue are negatively related.
In case of inelastic demand, price change and total revenue are positively related.
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