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Which of the following functions represents linear decay of a quantity with time \(t\)?

Answer and explanation

Correct answer: \(12-3t\)

In \(12-3t\), the power of \(t\) is 1, so the change is linear. The coefficient \(-3\) means the quantity decreases by 3 per unit time. \(12+3t\) shows growth. Exam tip: check the sign of the slope.

Related tags

PolynomialsLinear FunctionLinear DecaySlopeAlgebraClass 9Linear Growth And DecayIntroduction To Polynomials

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