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The equation of a line is \(y=-2\). Which statement is correct about its graph?

Answer and explanation

Correct answer: It is parallel to the \(x\)-axis

In the equation \(y=-2\), the value of \(y\) remains fixed for every value of \(x\). Therefore, its graph is a horizontal line 2 units below the \(x\)-axis and is parallel to the \(x\)-axis. It does not pass through the origin because the origin has \(y\)-coordinate 0. Exam tip: the graph of \(y=c\) is always parallel to the \(x\)-axis, whereas the graph of \(x=c\) is parallel to the \(y\)-axis.

Related tags

Graphs Of FunctionsStandard FunctionsHorizontal LinesLinear EquationsCoordinate GeometryVarious Forms Of The Equation Of A LineStraight LinesMathematics

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