Q 1.Mental accounting is a concept in the field of behavioral economics. 2.Marginal utility diminishes as additional units are consumed, which means that each subsequent unit of a good consumed provides less additional utility. 3.Economists believe that the choices people make are influenced by their incomes, by the prices of goods and services they consume, and by factors like where they live. 4.What is an example of a rational decision? 5.Complete this equation: ______________ = (change in total utility) / (change in quantity)