Refer to the above table. Suppose the price of X increases from $10 to $12. What is the cross price elasticity of demand between X and Y?

Hyperinflation is

A) inflation caused by negative growth in the quantity of money. B) inflation at a rate that exceeds 5 percent a month. C) only theoretical and has never occurred in the real world. D) inflation caused by excessive growth in the demand for money. E) inflation at a rate that exceeds 50 percent a month.

The marginal dollar cost to a patient of visiting a doctor when the patient's bill will be paid entirely by insurance is

A) the same as if the patient had no insurance. B) the value of the care not received by some other patient who couldn't get an appointment. C) zero. D) zero only if the patient does not pay the insurance premiums.