In the above example, can you say whether z = – 50 x + 20 y has the maximum
value 100 at (0,5) For this, check whether the graph of – 50 x + 20 y > 100 has points
in common with the feasible region (Why )
Example 5 Minimise Z = 3x + 2y
subject to the constraints:
x + y ≥ 8