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For (x+y>3), what does the test point ( (0,0) ) indicate?

Answer and explanation

Correct answer: The side containing the origin is not shaded

Substituting the test point
(0,0) gives
0+0>3, i.e.
0>3, which is false. Hence, the side containing the origin is not the solution region; the opposite side must be shaded. Since the inequality is strict (
>), the boundary line
x+y=3 is drawn dashed and is not included. Exam tip: shade the side containing a test point only when that point satisfies the inequality.

Related tags

Linear InequalitiesGraphical SolutionTest PointOriginHalf PlanesBoundary LineGraphical Solution Of Linear Inequalities In Two VariablesMathematics

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