1/8
Price elasticity < 1
Inelastic
Price elasticity > 1
elastic
Cross price elasticity equation
% Change in Qd of Good X / % change in P of Good Y
Positive cross price elasticity
Substitutes
Negative cross price elasticity
Complements
Cross price elasticity is 0
Unrelated
Income elasticity equation
% Change in Qd / % Change in income
Positive income elasticity
Normal good
negative income elasticity
inferior good