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Which of the following equations represents a line parallel to the x-axis and intersecting the y-axis at \(-4\)?

Answer and explanation

Correct answer: \(y=-4\)

A line parallel to the x-axis has slope 0, so its equation is \(y=c\). With y-intercept \(-4\), \(c=-4\), giving \(y=-4\). In contrast, \(x=-4\) is a vertical line. Exam tip: every equation of the form \(y=c\) is horizontal.

Related tags

SlopeY-InterceptLinear EquationsCoordinate GeometryHorizontal LineSlope And Y InterceptIntroduction To PolynomialsMathematics

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