When John earned $65,000 he purchased 10 DVDs a year. His income has just increased to $68,000 and he plans to purchase 15 DVDs this year. John's income elasticity of demand equals
The difference between price elasticity of demand and income elasticity of demand is that
A) income elasticity of demand examines how an individual's income changes when prices change and the price elasticity of demand examines how quantity demand changes when price changes.
B) income elasticity refers to the movement along the demand curve while price elasticity refers to a horizontal shift of the demand curve.
C) income elasticity measures the responsiveness of income to changes in supply while price elasticity of demand measures the responsiveness of demand to a change in price.
D) income elasticity refers to a horizontal shift of the demand curve while price elasticity of demand refers to a movement along the demand curve.
Janice earns an income of $2,000 a week and goes out to lunch 3 times a week. If her income increased to $2,100 she would go out to lunch 4 times a week. Compute Janice's income elasticity of demand.
The income elasticity of demand
A) is positive only.
B) is negative only.
C) must lie between -1 and +1.
D) can be positive, negative, or zero.