Interpret connection sums and symmetry
Consider this network of civic buildings and the paths joining them. Each line is one path that can be used in both directions
Use this vertex order for both the rows and the columns of \(M\): Depot, Clinic, Council. Rows name the starting vertex and columns name the ending vertex
\[M = \begin{bmatrix} 0 & 1 & 0 \\ 1 & 0 & 1 \\ 0 & 1 & 0 \end{bmatrix}\]