[tex]\bf f(x)=\textit{some expression here in x-terms}
\\\\\\
\stackrel{\textit{when x = 3}}{f(3)}=\stackrel{\textit{that expression turns up to be 2}}{2}\qquad \qquad \stackrel{\stackrel{x}{3}}{f(3)}=\stackrel{\stackrel{y}{2}}{2}\implies (3,2)[/tex]
