first commit

pearsonDW.pgf

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+\begin{tikzpicture}[scale=2]
+\definecolor{mycolor1}{rgb}{0.15, 0.47, 0.70}
+
+%\draw[->] (-1.5,-1.5) -- (2,-1.5) node[right] {$x$};
+%\draw[->] (-1.5,-2.5) -- (-1.5,0.8) node[left]{\footnotesize{$y=f(x)$}};
+%\clip[draw](-1.5,-1) rectangle (1.3,1);
+%\clip(-1.5,-1.3) rectangle (1.5,1);
+%\begin{axis} [axis lines=center]
+\begin{scope}
+\draw[scale=0.5,domain=-1.9:1.9,smooth,thick,variable=\x,color=mycolor1] plot ({\x},{0.75*\x^3-2*\x-1.});
+%\plot [domain=-2:2, smooth, thick, color=blue] { x^3 - 2*x };
+\end{scope}
+%\end{axis}
+
+\draw[-latex] (-1.5,-1.5) -- (1.8,-1.5) node[right] {\footnotesize{$x$}};
+\draw[-latex] (-1.5,-1.5) -- (-1.5,0.8) node[left] {\footnotesize{$y=f(x)$}};
+
+\draw[color=red] (-2.1,0.17) -- (1.3,0.17);
+\draw[color=red] (-2.1,-1.15) -- (1.3,-1.15);
+
+\draw[latex-latex, color=orange](-1.9,-1.15)--(-1.9,0.17) node[midway,left]{\footnotesize\textbf{{Wertebereich}}};
+
+\draw[color=green] (-0.95,0.-1.9) -- (-0.95,-1.14);
+\draw[color=green] (0.95,0.-1.9) -- (0.95,0.17);
+
+\draw[latex-latex,color=green!50!black] (-0.95,-1.8) -- (0.95,-1.8) node[midway, below]{\footnotesize{Definitionsbereich}};
+\end{tikzpicture}