You observe a linear programming problem that has been solved using the graphical method of linear programming. The feasible region and optimal solution are clearly labeled. How could you identify the slack or surplus amounts in the scenario?

What will be an ideal response?

Slack or surplus would be evident by the relation of the constraint lines to the optimal point at the edge of the feasible region. The slack or surplus would be the distance between the optimal solution point and the line representing a nonbinding constraint.