Example:Functions are relations

From CS2800 wiki

You can think of a function [math]f [/math] as a special kind of relation: you would say [math]\href{/cs2800/wiki/index.php/Pair}{(x,y)} \href{/cs2800/wiki/index.php/%5Cin}{\in} f [/math] if [math]f(x) = y [/math].