Graph f(x)=3 if x>0; 1 if x=0; x-1 if x<0

$f (x) = {\begin{cases} 3 & x > 0 \\ 1 & x = 0 \\ x - 1 & x < 0 \end{cases}$

Graph.

$f (x) = {\begin{cases} 3 & x > 0 \\ 1 & x = 0 \\ x - 1 & x < 0 \end{cases}$

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