Paper 1 · price elasticity of demand
The price of a product rises from 22 000 and demand falls from 4 000 to 3 000. Calculate the coefficient of the price elasticity of demand.
A1.125
B0.4
C0.75
D1.25
Explanation: PED = (% change in quantity demanded) / (% change in price). Change in Q = -1000/4000 = -0.25 = 25%. Change in P = 4000/18000 = 2/9. PED = 0.25 / (4000/18000) = (1/4) x (9/2) = 1.125.
ZIMSEC Economics Paper 1, June 2009, Q4

