Paper 1 · Demand and Supply
Which of the following could cause a shift of the demand curve from to ?
Aan increase in supply
Ba rise in the price of a substitute
Ca rise in the price of a complement
Da fall in the price of the product
Explanation: The diagram shows the demand curve shifting outward (rightward) from D1 to D2, indicating an increase in demand. A rise in the price of a substitute makes that substitute more expensive, so consumers switch to this good, increasing demand.
ZIMSEC Economics Paper 1, June 2010, Q5