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Which equation is used to draw the boundary line of x - 2y < 6?

Answer and explanation

Correct answer: x - 2y = 6

The graphical rule for a linear inequality is to replace its inequality sign by an equality sign to obtain the boundary line. Therefore, the boundary of x − 2y < 6 is x − 2y = 6, making option A correct. Because the original sign is the strict inequality <, points lying on the boundary are not included in the solution region, so the line is usually drawn dashed. That drawing convention does not change the boundary equation. Option B is still an inequality, option C reverses the comparison and describes another region, and option D represents a different condition altogether. Hence only option A gives the required boundary line.

Related tags

Linear-InequalitiesBoundary-LineGraphical-SolutionLinear InequalitiesGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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