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For which (k) will (y=100-(k+3)x) show linear decay?

Answer and explanation

Correct answer: \(k>-3\)

In \(y=100-(k+3)x\), the coefficient of \(x\), or slope, is \(-(k+3)\). For linear decay, the slope must be negative, so \(-(k+3)<0\). This gives \(k+3>0\), hence \(k>-3\). When \(k=-3\), the slope is zero and \(y=100\) is constant, not decay. Exam tip: check the sign of the coefficient of \(x\) to identify linear growth or decay.

Related tags

Linear DecayLinear FunctionsSlopeParameter InequalityPolynomialsLinear Growth And DecayIntroduction To PolynomialsMathematics

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