The Best Plan

Optimum at a corner

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Lines of equal profit are parallel. Slide them outward to increase profit.
• A linear objective is maximised at a corner of the feasible region.
• The best corner only changes when prices cross a threshold.

Steps

1. Maximise profit
2. The corner principle
3. When does the best corner change?
4. Counting corners
5. Test the corners
6. Prices change