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For which (k) will (y=90+(k-11)x) show linear growth?

Answer and explanation

Correct answer: \(k>11\)

In a linear equation, the coefficient of \(x\) gives the rate of change (slope). Here the slope is \(k-11\). For linear growth, this slope must be positive: \(k-11>0\), so \(k>11\). If \(k=11\), the slope is zero and \(y=90\) remains constant, so there is no growth. Exam tip: check the sign of the coefficient of \(x\) to identify growth, decay, or a constant value.

Related tags

Linear GrowthLinear EquationsSlopeParameter ConditionRate Of ChangeLinear Growth And DecayIntroduction To PolynomialsMathematics

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