4. The coefficient of price elasticity of supply is defined as: Remember: Es = coefficient of price elasticity Q D = Quantity Supplied P = Price The coefficient of price elasticity of supply is equal to the percentage change in quantity supplied divided by the percentage change in price. WHERE:∆Qs = QS2 – QS1 ∆ P = P2 – P1 %∆Qs = Qs2 – Qs1 Qs Qs = Qs2 + Qs1 2