Operation Research: 05: Linear Programming//Graphical method// multiple optimal solutions

i) Generally the method is used to solve the problem, when it involves two decision variables.
(ii) For three or more decision variables, the graph deals with planes and requires high imagination
to identify the solution area.
(iii) Always, the solution to the problem lies in first quadrant.
(iv) This method provides a basis for understanding the other methods of solution.