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Which of the following equations has a graph that is a straight line parallel to the y-axis?

Answer and explanation

Correct answer: \(x=-4\)

In a line of the form \(x=a\), the x-coordinate remains fixed, so the line is vertical and parallel to the y-axis. \(y=4\) is horizontal instead. Exam tip: a constant \(x\) indicates a vertical line.

Related tags

Coordinate GeometryStraight LinesSlopeY-InterceptLinear EquationsSlope And Y InterceptIntroduction To PolynomialsMathematics

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