Determine if the given relation is also a function StartSet

Determine if the given relation is also a function. StartSet left parenthesis 5 comma 4 right parenthesis comma left parenthesis 2 comma 1 right parenthesis comma left parenthesis 9 comma 9 right parenthesis comma left parenthesis negative 2 comma 6 right parenthesis EndSet{(5,4), (2,1), (9,9), (2,6)} Is the relation a function?

Solution

Yes , this relation is a function From the set {5,2,9,-2} to R .

Here all the elements of the set have unique image in R. No element have more than one image.

Hence the relation is a function.