Calculate income elasticity of demand and analyze goods classification
Formula: Income Elasticity = (% Change in Quantity Demanded) / (% Change in Income)
Normal Goods (YED > 0): Demand increases as income increases.
Inferior Goods (YED < 0): Demand decreases as income increases.
Luxury Goods (YED > 1): Income elastic - demand increases more than proportionally to income.
Necessity Goods (0 < YED < 1): Income inelastic - demand increases less than proportionally to income.
Business Application: Helps predict demand changes during economic cycles and target appropriate income segments.