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Which of the following expressions represents a linear decrease in a quantity over time?

Answer and explanation

Correct answer: \(P(t)=15-6t\)

In \(P(t)=15-6t\), the coefficient of \(t\) is \(-6\), so the quantity falls by 6 per time unit. Option A shows growth; in exams, a negative slope indicates linear decay.

Related tags

PolynomialsLinear FunctionsLinear DecaySlopeGrade 9 MathematicsLinear Growth And DecayIntroduction To PolynomialsMathematics

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