A consumer buys 8 units of a good at a price Rs.7 per unit. When price rises to Rs.8 per unit, he buys 7 units. Calculate price elasticity of demand through expenditure method. Comment on the shape of demand curve based on this information.

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1 Answers

Quantity (Units) Price (Rs.) TE (Rs.)
8 7 56
7 8 56

As per the expenditure approach, when with a change in price, the total expenditure remains unchanged, demand is unitary elastic (eD, = 1) The shape of demand curve will be rectangular hyperbola.

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