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If (C(d)=17+2d), by how much will (C(d)) increase when (d) increases by (1)?

Answer and explanation

Correct answer: \(2\)

The expression is \(C(d)=17+2d\). The coefficient of \(d\) is \(2\), so when \(d\) increases by \(1\), \(C(d)\) increases by \(2\times1=2\). The constant term \(17\) does not affect the rate of increase. Exam tip: in a linear expression \(a+bd\), the change per unit increase in \(d\) is the coefficient \(b\).

Related tags

Linear GrowthLinear PolynomialCoefficientRate Of ChangeUnit ChangeLinear Growth And DecayIntroduction To PolynomialsMathematics

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