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If the height of a plant is (h(t)=20+3t) cm, what type of change does it show?

Answer and explanation

Correct answer: Linear growth

The coefficient of t is 3, which is positive. Therefore, for every increase of 1 unit in t, the plant’s height increases by 3 cm, so this is linear growth. In linear decay, the coefficient of t would be negative, such as 20-3t. Exam tip: In y=a+bt, the sign of b indicates growth or decay.

Related tags

Linear GrowthLinear FunctionsPositive RatePolynomialsMathematicsLinear Growth And DecayIntroduction To PolynomialsClass 9 Mcq

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