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Which equation has an initial value of 250 for y and represents a constant decrease in y as x increases?

Answer and explanation

Correct answer: \(y=250-7x\)

In \(y=250-7x\), the coefficient of x is \(-7\), so y decreases by 7 for every 1-unit increase in x. \(y=250+7x\) shows growth, while an \(x^2\) relation is not linear. Exam tip: linear decay has a negative coefficient of x.

Related tags

Linear DecayLinear EquationsPolynomialsSlopeY-InterceptClass 9 MathematicsLinear Growth And DecayIntroduction To Polynomials

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