38 lines
774 B
TeX
38 lines
774 B
TeX
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\begin{tikzpicture} [
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% declare function={
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% func(\x)= (\x >= -3) * (\x^2) +
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% and(\x < -3) * (-\x);
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% }
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]
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\begin{axis}[
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xlabel = $x$, ylabel = $y$,
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width = 10cm, height=10cm,
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axis lines = middle,
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grid,
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xmin=-9, xmax=5,
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ymin=-7, ymax=7,
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legend pos=outer north east,
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legend style={cells={align=left}}
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]
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\addplot [
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blue,
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no marks,
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domain= -3:100
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]{2*x};
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\addplot [
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blue,
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no marks,
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domain= -100:-3
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]{-x};
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\addplot+[blue,mark=*,mark options={fill=white}] (-3,3);
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\addplot+[blue,mark=*] (-3,-6);
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\addlegendentry{$g(x) = \begin{cases}
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2x\text{, hvis } x \geq -3 \\
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-x \text{, hvis } x < -3
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\end{cases}$ \\}
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\end{axis}
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\end{tikzpicture}
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