Question

Ticket Sales  The set of ordered pairs below represents the number of tickets sold for a fundraiser. The​ x-coordinates represent the day and the​ y-coordinates represent the number of tickets sold on that day. Draw a mapping diagram of the relation. Is the relation a​ function?
StartSet left parenthesis 1 comma 19 right parenthesis comma left parenthesis 2 comma 23 right parenthesis comma left parenthesis 3 comma 23 right parenthesis comma left parenthesis 4 comma 29 right parenthesis comma left parenthesis 5 comma 31 right parenthesis EndSet
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Part 1
Which mapping diagram represents the​ relation?
A.
19
2
23
4
31
1
23
3
29
5
B.
1
23
3
29
31
19
2
23
4
5
C.
2
3
4
5
23
29
31
1
19
D.
19
23
29
31
1
2
3

Answer 1

The mapping is 1 → 19, 2 → 23, 3 → 23, 4 → 29, 5 → 31. (Two domain values map to 23, but each domain value has exactly one output.)

Answer: A. Yes — it is a function.