Following are the three forms of marginal utility:
(i) Positive Marginal Utility : When the consumer is satisfied by the consumption of additional unit of commodity.
(ii) Negative Marginal Utility: When the consumer is never satisfied by the consumption of goods.
(iii) Zero Marginal Utility : When the consumer gets neither satisfaction nor dissatisfaction by the consumption of goods, it is called Zero Marginal Utility.
These forms are clarified by the given schedule:
