Reference: ref 3-1 (figure: demand for coconuts) look at the gure demand for coconuts. If there is an increase in preference for coconuts, it will be represented in the gure as a movement from: b to e, c to a, a to c, b to a, figure: demand for dvds. Reference: ref 3-3 (figure: demand for dvds) look at the gure demand for dvds. Reference: ref 3-4 (figure: supply of coconuts) look at the gure supply of coconuts. They are the same thing: a shortage will exist when a good is scarce, scarcity is a result of two or more alternative uses, and quantities of supply and demand adjusting to. Exible prices will create shortages: suppose you manage a corner grocery store. Use the copy tool to create a new demand curve for tortilla chips after the increase in the price of salsa and label this line d2.