IB skill practice

Calculate price elasticity of demand

Use derivative information to calculate elasticity at a point.

Paper 1, Paper 2 5 marks Difficulty 4

Calculate price elasticity of demand - graph-supported reasoning

For a university admissions sample demand model, price is \(28\), quantity is \(84\), and \(\frac{dQ}{dP}=-2.4\). Calculate price elasticity \(\frac{dQ}{dP}\frac{P}{Q}\). Enter the requested value and choose the interpretation that matches the result.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.