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If a quantity starts at (12) and increases by (5) each step, which rule represents it?

Answer and explanation

Correct answer: \(y=12+5x\)

The starting quantity is 12, so the constant term must be 12. Since the quantity increases by 5 at each step, the coefficient of x is +5. Therefore, the rule is \(y=12+5x\). In \(y=12-5x\), the quantity decreases, so it does not represent growth. Exam tip: In a linear rule, the starting value is the constant term and the change per step is the coefficient of x.

Related tags

Linear GrowthLinear EquationInitial ValueRate Of ChangePolynomialsLinear Growth And DecayIntroduction To PolynomialsMathematics

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