Question 456750


{{{f}}} has the form of a {{{function}}}. A function has {{{one}}} or {{{more }}}{{{inputs}}} and {{{one}}} or {{{more }}}{{{ outputs}}}. 

In this case certain {{{x}}} variables are {{{maped}}} onto certain {{{y}}} variables.

since {{{f}}} represents a function, must represent the {{{graph}}} of a function too.