Which of the following relations are functions? Give reasons. If it is a function, determine its domain and range.
(i) {(2,1),(5,1),(8,1),(11,1),(14,1),(17,1)}
(ii) {(2,1),(4,2),(6,3),(8,4),(10,5),(12,6),(14,7)}
(iii) {(1,3),(1,5),(2,5)}

Answer

(i) yes Domain ={2,5,8,11,14,17}, Range ={1}
(ii) yes, Domain ={2,4,6,8,12,14}, Range ={1,2,3,4,5,6,7}
(iii) No.