The concept of relation is used in relating two objects or quantities with each other. Suppose two sets are considered, the relationship between them will be established if there is a connection between the elements of two or more non-empty sets. Mathematically, “a relation R from a set A to a set B is a subset of the cartesian product A × B obtained by describing a relationship between the first element x and the second element y of the ordered pairs in A × B”. Relations can be displayed as a table, a mapping or a graph. In the morning assembly at schools, students are supposed to stand in a queue in ascending order of the heights of all the students. It defines an ordered relation between the students and their heights.