(Solved): Graph the following piecewise-defined function. Indicate whether the endpoints of each piece (with ...

Graph the following piecewise-defined function. Indicate whether the endpoints of each piece (with a closed or open dot) are included on the gra \[ f(x)=\left\{\begin{array}{lll} 2 x-1 & \text { if } & x<3 \\ -1-\frac{1}{3} x & \text { if } & x \geq 3 \end{array}\right. \]