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Example: Solve 3x+2y> 6 graphically. Solution: The dotted line is the graph of the given inequality. This dotted line divides the xy plane in two half planes I and II. We select a point say (0,0) which lies in one of the half planes. We determine if this point satisfies the give inequality 3(0) + 2(0) > 6 which is false. The shaded half plane II excluding the points on the line is the solution region of the inequality.
Directions: Draw the graphs. 