CIE A Level Topical Past Paper 2 7.1 Utility Return to topics list 9708/42/O/N/24Evaluate whether marginal utility theory can fully explain the link between the changing price of a good and quantity demanded of that good. [20] 9708/42/O/N/21 a) Use marginal utility analysis to explain the derivation of the individual demand curve for a good. [12]