Directed Graphs
In the interactive figure, enter a 0 in place of the "?" in the spreadsheet on the right if there is no directed path from the first vertex to second vertex. Enter a 1 in place of the "?" in the spreadsheet on the right if there is a directed path from the first vertex to second vertex.
When you have replaced all the "?", click on the "Check Answer" button. Correct entries will be colored GREEN and incorrect entries will be colored RED.