Answer to Question #88071 in Discrete Mathematics for Jene M Kelly

Question

Let C = {1, 4, 5} and D = {2, 7}.

• List the elements of C × D.
• If there are 140 elements in D × A, how many elements are in A?
• Give an example of a relation from D to C that is not a function. Draw a graph of the
relation. Explain why it is not a function.
• Give an example of a relation from C to D that is a function. Draw an arrow diagram for the relation

Answer 1

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