In the United States, the poorest 20 percent of households receive about ________ percent of total income

If the supply curve is vertical, then supply is

A) relatively elastic. B) perfectly elastic. C) unit elastic. D) perfectly inelastic.

Which of the following is not a reason for the downward slope of the aggregate demand curve?

a. Real balances effect b. Interest-rate effect c. Net exports effect d. Government spending effect