The income elasticity of demand for a product is -2.5. Which one of the following statements is correct?
A 10%10\%10% increase in income leads to a 25%25\%25% fall in quantity demanded.
A 10%10\%10% increase in price leads to a 25%25\%25% fall in quantity demanded.
The product is a luxury, normal good.
Demand for the product is income inelastic.