\input epsf
\nopagenumbers
\magnification=\magstep1

\noindent {\bf Problem statement} Some lines which are tangent to the
parabola $y=x^2$ also pass through the point $(2,3)$. Find all of
these lines. Graph the parabola and the tangent lines which were found
on the same coordinate axes.


\vfil\eject\end