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Which of the following polynomial relations represents linear decay in \(y\) as \(x\) increases?

Answer and explanation

Correct answer: \(y=50-3x\)

In \(y=50-3x\), the degree of \(x\) is 1 and its coefficient is \(-3\), so \(y\) decreases by 3 for every 1-unit increase in \(x\). \(y=50-3x^2\) is quadratic, not linear. Exam tip: identify degree 1 with a negative coefficient.

Related tags

PolynomialsLinear DecayLinear GrowthDegree Of PolynomialAlgebraClass 9Linear Growth And DecayIntroduction To Polynomials

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