Supply and Demand

A year ago, there were 12 companies that made motorized scooters. But over the past month, 5 of those companies went out of business. What probably happened to the overall supply of motorized scooters?

• The supply probably went up.

• The supply probably went down.

In 1940, scientists invented a new form of synthetic, or artificial, rubber. It was cheaper to work with than natural rubber. What happened to the overall supply of rubber tires after 1940?

• The supply went up

• The supply went down

A drought has made this year's tomato harvest smaller than usual. What will probably happen to the overall supply of tomato sauce?

• The supply will probably go up

• The supply will probably go down

Last year, 50,000 people lived in the city of Fairfax.

But since then, 8,000 people have moved away. What probably happened to the overall supply of houses for sale in Fairfax?

• The supply probably went up

• The supply probably went down

In the 1970s, several countries in the Middle East decided to pump less oil from their oil wells. Oil is often made into gasoline. What happened to the world's overall supply of gasoline?

• The supply went up

• The supply went down

Long ago, all books were copied by hand. Making new copies was a lot of work and took a long time. But the invention of the printing press made copying books faster and easier. What happened to the overall supply of books after the printing press was invented?

• The supply went up.

• The supply went down

According to a recent newspaper story, more Americans own dogs than ever before. As a result, ten new companies start making and selling dog food. What will probably happen to the overall supply of dog food?

• The supply will probably go up.

• The supply will probably go down.

Weather forecasters predict this summer will be much hotter than usual. What will probably happen to the demand for air conditioners?

• The demand will probably go up

• The demand will probably go down

Summerfield's population has grown by 10,000 people per year for the last five years. What has probably happened to the overall demand for apartments in Summerfield?

• The demand has probably gone up

• The demand has probably gone down

Last year, taxes went up by $100 per person in

Dover. What probably happened to overall demand for goods and services in Dover?

• The demand probably went up

• The demand probably went down