Draw the directed graphs of the relations defined in 13-18.
Define a relation S in by .
To draw the directed graph of the relation defined on by
A Directed graph of ordered pair such that must contain an arrow from to and should satisfy .
We note that A contains 4 elements and thus we will draw 4 points.
We label these points a, b, c, d (which are the elements of A ).
For every element we draw an arrow from x to y
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