Having constructed the feasible region, we now need to find the best feasible solution, i.e., the optimal solution. We start this process by graphing the objective function line (a line giving a fixed value of
)
for some attainable value of .
For example, notice that (1, 2) is clearly in the feasible region, and (1, 2) yields
,.
Therefore, let us graph the objective function line for 
,
i.e., the line given by the equation,
.