### Income-elasticity of demand coefficient

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##### Reference no: EM1367380

a) Use the arc-approximation formula to calculate the price-elasticity of demand coefficient of a firm's product demand between the (quantity,price) points of (50, \$10) and (54, \$8).

b) Calculate the cross-price elasticity of demand coefficient of a firm's product X, given that a 10% increase in the price of its close substitute, product Y, causes the quantity demand of
product X to increase by 15%.

c) Calculate the income-elasticity of demand coefficient for a product for which a 5% increase in consumers' income will increase the quantity demanded by 4%.

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