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Which of the following polynomials represents linear decay of a quantity as x increases?

Answer and explanation

Correct answer: \(y=8-3x\)

In \(y=8-3x\), the coefficient of x is negative, so y decreases at a constant rate as x increases; this is linear decay. \(8+3x\) shows growth. Exam tip: check the sign of the x-coefficient.

Related tags

PolynomialsLinear DecayLinear GrowthCoefficientAlgebraClass 9Linear Growth And DecayIntroduction To Polynomials

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