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If (f(x)=a+15x) and (f(4)=112), what will (f(11)) be?

Answer and explanation

Correct answer: 217

Given \(f(x)=a+15x\) and \(f(4)=112\), we get \(a+15(4)=112\). Thus, \(a+60=112\), so \(a=52\). Now \(f(11)=52+15(11)=52+165=217\). Hence, option B is correct. The value 232 can result from incorrectly adding the growth term. Exam tip: first find the unknown constant using the given function value, then substitute the required value of \(x\).

Related tags

Linear FunctionsPolynomialsFunction EvaluationConstant TermLinear GrowthLinear Growth And DecayIntroduction To PolynomialsMathematics

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