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Linear functions: Added

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Martin Thoma 2020-09-09 22:43:05 +02:00
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\documentclass[varwidth=false, border=2pt]{standalone}
\usepackage{pgfplots}
\usepackage{tikz}
\usepackage{nicefrac}
\pgfplotsset{every axis legend/.append style={
at={(0,0)},
anchor=north east}}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
axis x line=middle,
axis y line=middle,
grid = major,
width=8cm,
height=8cm,
grid style={dashed, gray!30},
xmin=-5, % start the diagram at this x-coordinate
xmax= 5, % end the diagram at this x-coordinate
ymin=-5, % start the diagram at this y-coordinate
ymax= 5, % end the diagram at this y-coordinate
xlabel=x,
ylabel=y,
legend cell align=left,
legend pos=south east,
legend style={draw=none},
tick align=outside,
enlargelimits=false]
% plot the function
\addplot[domain=-5:5, red, ultra thick,samples=500] {0.5*x};
\addplot[domain=-5:5, green!50!black, ultra thick,dashed,samples=500] {x};
\addplot[domain=-5:5, blue, ultra thick,dotted,samples=500] {2*x};
\legend{$\nicefrac{1}{2} \cdot x$,$x$,$2 \cdot x$}
\end{axis}
\end{tikzpicture}
\end{document}