Question

Jess owns a sandwich shop. the price of a sandwich recently increased from​ $5 to​ $7. jess responded by increasing the quantity of sandwiches she supplied from 70 to 90 per day. using the midpoint​ method, jess's price elasticity of supply is equal to

Answer 1

0.75 The midpoint method is to calculate the percentage as the change in value divided by the average (or midpoint) of the new and old values. So the price of the sandwich changed from $5 to $7. Using the midpoint formula, you get (7-5)/((7+5)/2) = 2/(12/2) = 2/6 = 0.3333 = +33.3% The change in sandwiches due to the change in price is (90-70)/((90+70)/2) = 20/(160/2) = 20/80 = 0.25 = +25% The elasticity of supply will be the percentage change in demand divided by the percentage change in price. So 25/33.3 = 0.75 So the coefficient of elasticity is 0.75