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If (A(t)=18+2t) and (B(t)=30+5t), how does (B(t)-A(t)) change?

Answer and explanation

Correct answer: It increases by 3 each step

Find the difference: (B(t)-A(t))=(30+5t)-(18+2t)=12+3t. The coefficient of t is 3, so the difference increases by 3 for every increase of 1 in t. Therefore, option A is correct. The value 12 is the initial difference, not the rate of increase, so option D is incorrect. Exam tip: when subtracting linear expressions, subtract the constant terms and the coefficients of t separately.

Related tags

PolynomialsLinear ExpressionsRate Of ChangeDifference Of FunctionsLinear GrowthLinear Growth And DecayIntroduction To PolynomialsMathematics

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