Demand Shift - Two Supply Curves 1   To the right is a graph showing a demand shift for two different types of supply curves; SI, a curve for an inelastically supplied good and SE, a relatively elastic supply curve.

  Starting from the initial equilibrium price P* and quantity Q* with a demand shift from D1 to D2, at supply SI the price increases to P2 and the quantity increased to Q2; a large increase in price and a modest increase in quantity.

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