Which of the following relations are functions? Give reasons. If it is a function, determine its domain and range.

{(2,1), (5,1), (8,1), (11,1), (14,1), (17,1)}

Since, 2, 5, 8, 11, 14 and 17 are the elements of domain R having their unique images. Hence, this relation R is a function.

As Domain of R = set of all first elements of the order pairs in the relation.

⇒ Domain of R = {2, 5, 8, 11, 14, 17}

Range of R = set of all second elements of the order pairs in the relation.

⇒ range of R = {1}.