Next exam for D1: Friday 16th June

This diagram shows how the optimum value of a quantity Q = ax+by can be found from a linear programming graph. First the constraints are plotted to create an unshaded region within which solutions must occur.

Graphs of Q=ax+by are plotted for various values of Q and can be used to help identify the values of x and y that give the required values of Q.

Graphs of Q=ax+by are plotted for various values of Q and can be used to help identify the values of x and y that give the required values of Q.

## Software/Applets used on this page

## Glossary

### linear

Straight, not curved. A linear equation is of the first degree, for example y = 2x+1.