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If the directed graph of a relation has an arrow from (x) to (y), what is necessary for the relation to be symmetric?

Answer and explanation

Correct answer: There must also be an arrow from (y) to (x)

Step 1: An arrow from (x) to (y) represents ((x,y)\in R). Step 2: Symmetry requires ((y,x)\in R) as well. Step 3: Therefore an arrow in the reverse direction is necessary.

Related tags

Directed GraphSymmetric RelationVisual ReasoningRelations And FunctionsMathematicsClass 12 Mcq

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