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If \(f=\{(2,4),(3,9),(5,25)\}\), which rule correctly defines \(f\)?

Answer and explanation

Correct answer: \(f(x)=x^2\)

In every ordered pair, the second component is the square of the first: \(2^2=4\), \(3^2=9\), and \(5^2=25\). Therefore, the correct rule is \(f(x)=x^2\). Option B gives \(f(2)=4\), but \(f(3)=6\), so it does not fit all the pairs. In an exam, test the proposed rule with each given input.

Related tags

FunctionsRelationsRule IdentificationSquare FunctionFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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