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If (p=-9) and (q=14) in (y=px+q), which statement is correct?

Answer and explanation

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

In the form (y=px+q), p is the slope and q is the y-intercept. Here, p=-9, so y decreases as x increases; hence, the line decreases. Since q=14 is positive, the line meets the y-axis above the origin. Option C is incorrect because a horizontal line has slope 0. Exam tip: use the sign of the slope for increasing or decreasing behaviour, and use q for the y-intercept.

Related tags

SlopeY-InterceptLinear EquationsCoordinate GeometrySign AnalysisSlope And Y InterceptIntroduction To PolynomialsMathematics

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