ECSENOMICS The Law of Diminishing Marginal utili T37 Figure 5 (a)Total Utility (b) Marginal Utility 5. 5 McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. T-37 Figure 5-1 The Law of Diminishing Marginal Utility