May/June 2026 Paper 13

2026 · 30 questions · 30 parts · 30 marks

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9Market Equilibrium Price MechanismHard1 mark
The diagram shows two demand curves and two supply curves in the market for coffee beans.
Diagram, two demand curves and two supply curves for coffee beans on axes of price (vertical) and quantity (horizontal). Supply curve S1 and demand curve D1 (both further right) cross at E1, at the higher price P1. Supply curve S2 and demand curve D2 (both shifted left of S1 and D1) cross at E2, at the lower price P2 and a lower quantity; both quantities are printed as Q1 on the axis.
Coffee beans and tea are substitutes for consumers.
What is the likely cause for the change in equilibrium from to ?