% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{tikzpicture}
    \begin{axis}[
        xmin=0,
        ymin=0,
        ymax=120,
        ticks=none,
        axis x line=bottom,
        axis y line=left,
        axis line style={-Triangle},
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=north east, rotate=-90},
        ylabel={$U$},
        xlabel={$t$},
        scale only axis, 
        width=\linewidth*\getDarcImageFactor,       
        height=3cm
    ]
        \addplot[domain=0:8, thick, smooth] {100*(e^(-1*(8-x)))};
    \end{axis}
\end{tikzpicture}