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Which of the following linear polynomials shows that the quantity decreases at a constant rate as x increases?

Answer and explanation

Correct answer: \(-3x+11\)

In a linear polynomial \(p(x)=ax+b\), increasing x by 1 changes p(x) by \(a\). Here \(a=-3\), so the value falls by 3 each step. \(-3x^2+11\) is not linear. Exam tip: a negative coefficient of x indicates linear decay.

Related tags

Linear PolynomialsLinear DecayConstant RateCoefficientAlgebraClass 9Linear Growth And DecayIntroduction To Polynomials

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