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If f:{0,1,2}→{0,1,2,3,4} is defined by f(x)=x², what is the graph of f as a set of ordered pairs?

Answer and explanation

Correct answer: {(0,0),(1,1),(2,4)}

The graph of a function defined on a finite domain is the set of ordered pairs (x,f(x)) for every x in the domain. The first coordinate must come from the domain {0,1,2}, and the second coordinate is obtained by squaring it. Thus f(0)=0²=0, f(1)=1²=1, and f(2)=2²=4. The graph is therefore {(0,0),(1,1),(2,4)}, which is option A. Option B uses values from a different rule, while option C reverses the ordered pair (2,4) and incorrectly places 4 as an input. Option D treats the function as though f(2)=2 rather than 4. The codomain contains 4, so the pair (2,4) is valid.

Related tags

FunctionsGraph-Of-FunctionOrdered-PairsFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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