Income and utility Graphically, Utility increasing with income U'(l)>o Marginal utility decreasing U"(1)>o U() → Bhattacharya,Hyde and Tu-HealthEconomics Bhattacharya, Hyde and Tu – Health Economics Income and utility  Graphically,  Utility increasing with income U’(I) > 0  Marginal utility decreasing U’’(I) > 0