Solution
A relation can be thought of as a set of ordered pairs. We consider the first element of the ordered pair to be related to the second element of the ordered pair. Definition: A relation R from a set X to a set Y is a subset of the Cartesian Product X x Y, if (x, y) ∈ R, we write x R y and say that x is related to y.
The inputs ... the x values ... are on the left ...(from)
The outputs ... the y values ... are on the right ... (ro)
The coordinates are:
