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A quantity has an initial value of 50 and decreases uniformly by 4 in each unit of time. Which polynomial represents this linear decay?

Answer and explanation

Correct answer: \(Q(t)=50-4t\)

The initial value is the constant term, so it is 50. A decrease of 4 per time unit gives the coefficient of \(t\) as \(-4\), hence \(Q(t)=50-4t\). \(50-4t^2\) is not linear. Exam tip: constant change means degree 1.

Related tags

PolynomialsLinear GrowthLinear DecayLinear PolynomialRate Of ChangeGrade 9 MathematicsLinear Growth And DecayIntroduction To Polynomials

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