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If the number of objects starts from (5) and increases by (6) each step, what is the correct rule after (x) steps?

Answer and explanation

Correct answer: \(y=5+6x\)

The initial number is 5, so it is the constant term. Since the number rises by 6 at each step, the total increase after \(x\) steps is \(6x\). Hence, the rule is \(y=5+6x\). In \(y=6+5x\), the initial value and the rate of increase are interchanged. Exam tip: in a linear rule, the constant term is the starting value and the coefficient of \(x\) is the change per step.

Related tags

Linear GrowthLinear ExpressionPolynomialsAlgebraic ModellingGrade 9 MathematicsLinear Growth And DecayIntroduction To PolynomialsMathematics

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