. How do economists describe satisfaction? . Describe the shape of a total utility (TU) curve. Show it in a graph. . Describe the shape of marginal utility (MU) curve. Show it in a graph. . What principle gives the total utility curve its shape? 1 2 3 4. What is the mathematical formula for marginal utility? 5 6. Why does a marginal utility curve slope the way it does? I" . Explain why each unit of something that you consumed gives you less utility than the one before it