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Akash Shinde · Answer 1 · 2023-06-08T06:24:13+0000

A function is a relation in which each input has only one output. When we consider a set of ordered pairs, a function does not have two similar values for x. That is for example, {(2,1) , (2,3)} is not a function where as, {(1,3), (2,3)} is a function.

Therefore from the given sets,

$\mleft\lbrace(0,4\mright),(4,-2),(-5,-2),(1,9)\}$

is a function.

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