-Consider the digraphs shown above ; how many vertices from the digraph shown in figure 2 are incident to vertex O?
A) 0
B) 1
C) 2
D) 3
E) None of the above.

Question

-Consider the digraphs shown above ; how many vertices from the digraph shown in figure 2 are incident to vertex O?
A) 0 
B) 1 
C) 2 
D) 3 
E) None of the above.

Quizplus · Accepted Answer

In a digraph, a vertex is incident to another if there is a directed edge from the first vertex to the second. If figure 2 has two vertices with directed edges pointing to vertex O, then the answer is 2.

-Consider the Digraphs Shown Above ; How Many Vertices from the Digraph