Mathematics"A collection of ordered pairs comprising one object from each set constitutes a relation between two sets. If the ordered pair (x,y) is in the relation and the item x is from the first set and the object y is from the second set, the objects are said to be related. "...
"A collection of ordered pairs comprising one object from each set constitutes a relation between two sets. If the ordered pair (x,y) is in the relation and the item x is from the first set and the object y is from the second set, the objects are said to be related.