Provide page references to the Common Sense Economics textbook, the readings in the supplement, and other learning materials when appropriate. Bold your sentences. 8. What is the difference between a "change in quantity demanded" and a "change in demand"? 9. How would an increase in the price of steel, a resource used to produce automobiles, impact the demand for or supply of automobiles? 10. How would a reduction in the price of airline travel, a substitute form of transportation, impact the demand for or supply of automobiles