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At which point do the lines \(x=-2\) and \(3x+y=1\) intersect?

Answer and explanation

Correct answer: \((-2,7)\)

The intersection point must satisfy both equations. Substituting \(x=-2\) into \(3x+y=1\) gives \(3(-2)+y=1\), or \(-6+y=1\), so \(y=7\). Therefore, the intersection point is \((-2,7)\). Option C has the wrong sign for the \(y\)-coordinate. Exam tip: Every point on the vertical line \(x=-2\) has \(x\)-coordinate \(-2\).

Related tags

Pair Of Linear EquationsGraphical MethodIntersection Of LinesCoordinatesGraphical Method Of Finding Solutions.Graphical Method Of Finding SolutionsPair Of Linear Equations In Two VariablesMathematics

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