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Which equation represents a line that has the same \(y\)-intercept as \(3x+2y=8\) and is perpendicular to it?

Answer and explanation

Correct answer: \(2x-3y=-12\)

Writing the given line as \(y=-\frac{3}{2}x+4\) gives slope \(-\frac{3}{2}\) and y-intercept 4. A perpendicular line has slope \(\frac{2}{3}\), so \(y=\frac{2}{3}x+4\), which is option C. Option B has intercept 4 but slope \(-\frac{2}{3}\). Exam tip: perpendicular slopes multiply to \(-1\).

Related tags

Linear EquationsSlopeY-InterceptPerpendicular LinesCoordinate GeometryClass 9 MathematicsSlope And Y InterceptIntroduction To Polynomials

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