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If (p=-4) and (q=9) in (y=px+q), which statement is correct?

Answer and explanation

Correct answer: The line decreases and the y-intercept is positive

In y=px+q, p is the slope and q is the y-intercept. Since p=-4 is negative, y decreases as x increases, so the line decreases. Since q=9 is positive, the line cuts the y-axis above the origin. Option C is incorrect because a horizontal line must have slope 0. Exam tip: use the sign of p to identify whether the line rises or falls, and the sign of q to locate the y-intercept.

Related tags

Linear EquationsSlopeY-InterceptCoordinate GeometrySign AnalysisGraph BehaviorSlope And Y InterceptIntroduction To Polynomials

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