18. (point $$ Match each system of linear equations with the graph that most closely matches it. Click on a graph to make it larger 2.1. $\left\{\begin{array}r}x=0\\x-z=0 \\ z=0\end{array} ight. $ [? 2. $\left\{\begin{array}{1}x=0 W zal \\ zz-1\end{array} ight. $ 23. $\left\{\begin{array}r}z=0 11 1/2=1 3 2-3=0\end{array} ight. $ [24. $\left\{\begin{aligned} z 8=1 \xtz &=1 \\ z 8=-1 z 831 \end{aligned} ight. $ $5 . \left\ {\begin{aligned) ztx &=1 Z-x 8=1 \end{aligned} ight. $ 26. S\left\{\begin{array}{1}x= 1 ya z=\end{array} ight. $ 27. $\left\{\begin{array}{r}x+zel z=/ 3 x+3 z=3\end{array} ight. $ ? 8. $\left\{\begin{aligned) z 813 z 8=3 \\-1 / z 8-1 \end{aligned} ight.$ ? 9. $\left\{\begin{array}{1}z=1 \\ z=0 W zz-l\end{array} ight. $ SP.SD. 468