If the income elasticity of demand for a good is equal to 1 and the price elasticity of demand is unit elastic, what does this imply about the good when income increases?

If the income elasticity of demand for a good is equal to 1, it means that when people's income increases by a certain percentage, the quantity demanded for that good also increases by the same percentage. This shows that the good is a normal good, which people buy more of as they have more money. When the price elasticity of demand is unit elastic, it indicates that changes in price will lead to proportional changes in the quantity demanded. For example, if the price of the good goes up by 10%, the quantity demanded will decrease by 10%. Together, these elasticities suggest that as income rises, the demand for the good increases at the same rate, making it a good that people will continue to buy even if its price changes.