Answer
Please see the graph.
Work Step by Step
The line on the left hand side is the first part of the piecewise function. The line on the right hand side is the second part of the piecewise function.
The piecewise function was as follows: $f(x)=x-2$ (if $x\leq0$), $-\frac{x}{3}$ (if $x\geq3$).