1. Graph the following systems of linear equations' in R2 on a set of coordinate axes; the graphs of the selines should be straight and accurate. Use the graph to

determine if the system has zero, one, or infinitely many solutions, and say if the system is consistent or inconsistent. \text { (a) }\left\{\begin{array}{l} 3 x+y=6 \\ x-2 y=-5 \end{array}\right. \text { (b) }\left\{\begin{array}{l} 2 x-6 y=3 \\ -x+3 y=-3 \end{array}\right. \text { (c) }\left\{\begin{array}{l} 3 x+y=-2 \\ -6 x-2 y=4 \end{array}\right.