If the resulting statement is true,

If the resulting statement is true, shade that side of the line; if not, shade the other side. Because (0, 0) is clearly below the plotted line, and because substituting x1 = 0 and x2 = 0 into the constraint gives 0 < 150 (which is a true statement), then the side of the line that includes the point (0, 0) must be shaded. The combination of two non-negativity constraints and constraint 1 limits the area of feasible solution to the ABC triangle shown in Figure 2-1a. Constraint 2 (x1 ≥ 3) limits the area of feasible solution further, as shown in Figure 2-1b. Similarly, adding constraint 3 limits the area to the HIJ triangle, as shown in Figure 2-1c.