Which of the following sets of ordered pairs is a function?I.{(–1,3),(1,2)(1,5)(3,8)}II.{(4,4)}III.{(1,5),(2,5),(3,5),(4,5)}

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Which of the following sets of ordered pairs is a function?<br>I.{(–1,3),(1,2)(1,5)(3,8)}<br>II.{(4,4)}<br>III.{(1,5),(2,5),(3,5),(4,5)}