please help me with these questions

1. If the quantity demanded increases by 20 percent in response to a 10 percent decrease in price,

demand is classified as:

a. Unstable.

b. Relatively inelastic.

c. Relatively elastic.

d. Of unitary elasticity.

2. If a demand curve for a good were completely vertical, it would be considered:

a. Perfectly elastic.

b. Perfectly inelastic.

c. Of unitary elasticity.

d. Relatively inelastic.

3. The price elasticity of demand for gasoline measures the:

a. Responsiveness of gasoline producers to changes in the quality of gasoline.

b. Responsiveness of customers to changes in the price of gasoline.

c. Responsiveness of consumer preferences to changes in the quality of gasoline.

d. Both a and c above.

4. If demand is price elastic, a decrease in price causes:

a. An increase in total revenue.

b. A decrease in total revenue.

c. No change in total revenue.

d. An increase in quantity, but anything can happen to revenue.

5. A perfectly elastic demand curve has an elasticity coefficient of:

a. 0.

b. 1.

c. Less than 1.

d. Infinity.

6. If the demand for cigarettes is highly inelastic, this indicates that:

a. Higher cigarette prices will increase the demand for cigarettes.

b. The price elasticity coefficient of cigarettes exceeds 1.

c. The price elasticity coefficient of cigarettes equals 1.

d. The quantity of cigarettes purchased by consumers is not very responsive to a change in

the price of cigarettes.

7. If the income elasticity of demand for a good is negative, the good is an inferior good.

a. True

b. False

8. If the supply of a good is inelastic, a decrease in price must increase total revenue.

a. True

b. False

9. If demand for a good is price elastic, it must also be income elastic.

a. True

b. False

10. Goods with few available substitutes tend to have inelastic demand curves.

a. True

b. False