D Dunny New member Oct 23, 2010 #1 ...correspondence is 1 : 1 or many : 1.? a (1,3), (2,4), (3,5), (4,6) b (-1,-3), (0,-3), (2,6), (3,9)
...correspondence is 1 : 1 or many : 1.? a (1,3), (2,4), (3,5), (4,6) b (-1,-3), (0,-3), (2,6), (3,9)
