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What are the slope and (y)-intercept of (9x+3y-27=0)?

Answer and explanation

Correct answer: Slope −3 and y-intercept 9

Solve the given equation for y: 9x+3y−27=0, so 3y=−9x+27 and y=−3x+9. In the form y=mx+c, m is the slope and c is the y-intercept. Therefore, the slope is −3 and the y-intercept is 9. Option B has the correct intercept but the wrong sign for the slope. Exam tip: Rewrite the equation in y=mx+c form before identifying m and c.

Related tags

Linear EquationsSlopeY-InterceptSlope-Intercept FormCoordinate GeometryAlgebraSlope And Y InterceptIntroduction To Polynomials

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