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What are the signs of the slope and y-intercept in the line y = -9x + 11?

Answer and explanation

Correct answer: Slope negative and y-intercept positive

The relevant rule is the slope-intercept form y = mx + c. In the equation y = -9x + 11, comparison term by term gives m = -9 and c = 11. Thus the slope is negative, meaning the line decreases as x increases. The y-intercept is positive, with the line crossing the y-axis at (0, 11). Therefore option B is the only correct choice. Option A wrongly changes the sign of the slope. Option C reverses both signs, and option D treats two nonzero values as zero. The negative sign attached to the x coefficient affects m only; it does not change the sign of the separate constant term 11.

Related tags

Negative SlopePositive Y-InterceptSign AnalysisStraight LineSlope And Y InterceptIntroduction To PolynomialsMathematicsClass 9 Mcq

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