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If the graph has \(x+y\leq 7\), is the line \(x+y=7\) included in the solution?

Answer and explanation

Correct answer: Yes

The symbol \(\leq\) includes equality. At every point on the line \(x+y=7\), the value of \(x+y\) is 7, so all such points satisfy \(x+y\leq 7\). Therefore, the boundary line is included in the solution region and is drawn as a solid line. It is not limited to one point or to the origin. Exam tip: A boundary is included whenever the inequality has \(\leq\) or \(\geq\).

Related tags

Linear InequalitiesGraphical SolutionBoundary LineSolid LineTwo VariablesGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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