26. Determining Cause and Effect Razor blades are complementary goods for razor handles, while electric razors are substitutes. Copy the demand curves below on a sheet of paper. Then show how the rise in the cos of razor handles, if they were sold separately, would affect the demand curves for its complementary and its substitute products. RAZOR BLADES ELECTRIC RAZORS Quantity Quantity 27. Making Generalizations Do you think the Law of Demand accurately reflects most people's behavior regarding certain purchases? Explain. 28. Synthesizing Assume that you are a business owner. How would you use your knowledge of demand elasticity to determine the price of your product? Math Practice 29. Mindy is trying to estimate the elasticity of demand for a product she wants to sell at a craft fair. She has been told that she can expect to sell 10 items if she charges a price of $10, six items if she charges a price of $20, and 18 items at a price of $5. a. Make a demand schedule to show the quantities demanded at each price, and plot a demand curve. b. At which price would the total expenditures by consumers be greatest for the product? At what price would expenditures be the smallest? Chris Britt, Copley News Service