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Which rule has equal decrease of (4) per step?

Answer and explanation

Correct answer: \(y=60-4x\)

In \(y=60-4x\), the coefficient of \(x\) is \(-4\). Therefore, when \(x\) increases by 1, \(y\) decreases by 4 at each step. In \(y=60+4x\), the value increases by 4, while \(y=60\) has no change. Exam tip: In a linear rule \(y=a+bx\), the coefficient \(b\) gives the change per step.

Related tags

Linear DecayLinear EquationsRate Of ChangeCoefficientPolynomialsLinear Growth And DecayIntroduction To PolynomialsMathematics

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