Figure 3 shows the marginal utility that a consumer gains from drinking bottles of sports drink per day.
| Number of bottles of sports drink per day | Marginal utility |
|---|---|
| 1 | 25 |
| 2 | 20 |
| 3 | 14 |
| 4 | 8 |
| 5 | 3 |
| 6 | 0 |
When 6 bottles of sports drink per day are consumed:
average utility is maximised.
marginal utility is maximised.
opportunity cost is minimised.
total utility is maximised.
