number. 1. What is the range of the relation {(1, 2),(2, 3),(3,4),(4,5)}? A. { 1,4} B. {1, 2, 3, 4) C. {2, 3, 4,5) D.{1,2,3,4,5) 2. For the function {(1,6), (2,10), (3,14), (4,18)}, what is the domain? A. { 1, 6) B. {1,2,3,4} C.{1,2, 14,18} D.{6, 10, 14,18}