Refer to the following graphs.Which of the graphs correctly labels the axes of the AS/AD model?

"Underground" economic activity can best be described as

a. the construction of subway transportation. b. the building of foundation structures for skyscrapers. c. the mining and oil industries. d. barter or cash activity that is not reported as income.

Which of the following is an example of barter?

a. A parent gives a teenager a $10 bill in exchange for her babysitting services. b. A homeowner gives an exterminator a check for $50 in exchange for extermination services. c. A barber gives a plumber a haircut in exchange for the plumber fixing the barber's leaky faucet. d. All of the above are examples of barter.