Answer:
a. consumer preferences
b. number of buyers
c. incomes
d. price of related goods
e. price of related goods
f. expectations
Explanation:
a. Here, the consumer preferences regarding cars will change which will cause a decline in the demand for cars.
b. A baby boom implies an increase in population so the number of buyers will increase which will increase the demand.
c. Layoffs mean that unemployment will increase. This will reduce the income of the consumer. As a result, the demand for cars will decline.
d. Gasoline and cars are complements. An increase in the price of gasoline will cause the demand for cars to decline. So here demand is affected by price of related goods.
e. Tax rebates on the purchase of rail commuters will increase the demand for rail transport. Here, the demand is being affected by the price of a related good.
f. As the government announces to subsidize the production costs of the auto industry, the consumers will expect the price of cars to change in the future. The demand here will be affected by consumer expectations.