Relations Discussion

(The following is/are the initial prompt(s) for an online discussion; students may have posted responses, and prompts for further discussion may have been added, but these things are not shown.)

This discussion invites you to explore the idea of a “relation,” as understood by mathematicians, by proposing some examples.

In particular, see if you can think of an example of a relation involving things in the real world. Describe or name that relation. What set(s) is your relation on or between? What are its domain and range? Can you list some members of it? Can you show it as a plot, directed graph, or in some other visual form?