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Which of the following relations represents linear decay at a constant rate?

Answer and explanation

Correct answer: \(y=100-5x\)

In \(y=100-5x\), the coefficient \(-5\) means that \(y\) decreases by 5 units for every 1-unit increase in \(x\). Relations containing \(x^2\) or \(1/x\) are not linear. Exam tip: linear decay has a negative coefficient of \(x\).

Related tags

Linear DecayLinear GrowthPolynomialsLinear RelationGrade 9 MathematicsLinear Growth And DecayIntroduction To PolynomialsMathematics

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