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If (E(t)=21+11t), what is the difference between (E(4)) and (E(5))?

Answer and explanation

Correct answer: 11

Given E(t)=21+11t, E(4)=21+11×4=65 and E(5)=21+11×5=76. Therefore, the difference is 76−65=11. The constant term 21 does not affect the change between consecutive values; it is determined by the coefficient 11. Exam tip: in a linear expression a+bt, the difference between consecutive values is always b.

Related tags

Linear PolynomialsLinear GrowthConsecutive DifferenceRate Of ChangeMathematics Grade 9Linear Growth And DecayIntroduction To PolynomialsMathematics

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