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Which of the following functions represents linear decay over time?

Answer and explanation

Correct answer: \(P(t)=12-3t\)

In linear decay, \(t\) has power 1 and its coefficient is negative. \(12-3t\) has slope \(-3\). Although \(12-3t^2\) decreases, it is not linear. Exam tip: check the power of \(t\) and the sign of the slope.

Related tags

PolynomialsLinear Growth And DecayLinear FunctionsCoefficientSlopeClass 9 MathematicsIntroduction To PolynomialsMathematics

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