test_projectile.tex

\documentclass{article}
\title{Test Document}
\author{Carson Witt}

\usepackage{graphicx}

\begin{document}
\maketitle

\begin{figure}
\caption{This is my best graph}
\label{graph1}
\includegraphics[scale=0.5]{parametric_plot.pdf}
\end{figure}

I can now reference Figure \ref{graph1}

\end{document}