Demand Elasticity    In the graph to the right, DI is drawn very steep, to illustrate inelastic demand; while DE is drawn flatter, to illustrate elastic demand. Notice the effect of a shift from P1 to P2 in each case.

   Along DI quantity demanded drops slightly, from Q1 to Q2, consistent with inelastic demand. Along DE the effect of a price change is much more pronounced. Quantity drops from Q1 to Q2, a huge drop, and what we expect from very elastic demand.

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