Demand versus Quantity Demanded

In each of the following, are we describing a change in demand, or a change in quantity demanded? Be able to illustrate graphically! (Note: where more than one product or service is mentioned in a question, focus on the one that is underscored.)

1. The State of Texas raises tuition by 10%. As a result, enrollment in Texas colleges and universities drops by 5%.

2. Arkansas, Louisiana, Oklahoma and New Mexico raise their tuition rates by 20%. Consequently, enrollment in Texas colleges and universities rise by 8%.

3. A new study (widely reported and believed) indicates that potato chips cause liver rot in laboratory mice. As a result, potato chip sales fall by 22%.

4. The price of gasoline rises to $3.00 per gallon. Immediately, sales of large SUVs fall by 14%.

5. Spring break finally arrives. Bookings at Padre Island hotels rise by 88% (over the previous month).

6. Consumer incomes rise by 10%. Consequently, sales of normnuts fall by 9%. (By the way, are normnuts misnamed?)

7. A technological breakthrough drops the price of hoopies by 23%. Sales of hoopies rise by 2%. (Jumping ahead: what does this indicate relative to the price elasticity of demand for hoopies?)

8. The price of compact disc players falls by 12%. As a result, sales of the players increase by 17%.

9. The price of compact disc players falls by 12%. As a result, sales of CDs rise by 15%.

10. Supermodel Cindy Crawfish says that she really goes for guys who wear Stinky Splash. Sales of Stinky Splash surge by 88%.