Consider a linear programming problem with two variable and two constraints. The objective function is maximize x1+x2. The corner points of the feasible region are (0, 0), (0, 2), (2, 0) and (4/3, 4/3)
Let Y1 and Y2 be the decision variables of the dual and v1 and v2 be the slack variables of the dual of the given linear programming problem. The optimum dual variables are