Answer:
Total revenue will increase in all the situations.
Explanation:
A) PED = 1.2, the price of the good decreases, then the quantity demanded will increase in a larger proportion. For example, the price = $1 and the quantity demanded = 100 units, total revenue is $100. The price decreases 10% to $0.90, then the quantity demanded will increase 12% to 112 units, total revenue is $100.80
B) PED = 0.5, the price of the good increases, then the quantity demanded will decrease in a smaller proportion. For example, the price = $1 and the quantity demanded = 100 units, total revenue is $100. The price increases 10% to $1.10, then the quantity demanded will decrease 5% to 95 units, total revenue is $104.50
C) PED = 3, the price of the good decreases, then the quantity demanded will increase in a larger proportion. For example, the price = $1 and the quantity demanded = 100 units, total revenue is $100. The price decreases 10% to $0.90, then the quantity demanded will increase 30% to 130 units, total revenue is $117