### Theory:

Consider the following graph with some points plotted in it.

Every coordinates $$(5,2)$$, $$(3,-4)$$, $$(-1,2)$$ and $$(-3,-2)$$ plotted in a graph represents the location of $$A$$, $$B$$, $$C$$ and $$D$$ respectively in the graph.

The coordinates are always return in a particular order ( $$x$$ - coordinates (Abscissa) followed by $$y$$ - coordinates (Ordinate)).

This is an example where we play with the number pairs in mathematics.

Such number pairs are called ordered pairs.

In set language, the ordered pairs play a major role in mathematizing relations.
Ordered pairs are a pair of numbers or elements written in a particular order within the parenthesis $$(x,y)$$.
The first element in the ordered pair represents the element from first set and the second element in the ordered pair represents the element from second set.