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Which of these tables represent a function? x 2 4 6 7

Which of these tables represent a function? x 2 4 6 7-example-1
User Skrud
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A function is a rule which uniquely associates elements of one set A to another set B. An element can either be one to one or many to one.

For a one to one function, it is one input to one output

For a many to one function, more than one input can have the same output

The inputs are the values of x while the outputs are the values of y

If one input has more than one output, then it is not a function

Looking at the given options, table W is a function because no input has more than one output. For the others, a particular input has more than one output

The correct option is table W

User Ikarus
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