Identifying Functions from Mapping

Does this table represent a function?

• Yes 

• No

Is this set of ordered pairs a function or relation? 

• Function

• Relation

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?

{ (1,12), (2,24), (3,36), (4,48), (5,48) }

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Which mapping represents the table?

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Is the relation a function? Explain.

• Yes, the x-value 11 has two y-values paired with it.

• Yes, each x-value has only one y-value paired with it.

• No, the x-value 11 has two y-values paired with it.

• No, each x-value has only one y-value paired with it.

Does the following relation represent a function?

(1,5), (1,6), (1,7), (1,8), (1,9)

• Yes, there are no repeated x-values

• No, there are repeated x-values

Does the table represent a function?

• Yes

• No

Does the graph represent a function?

• Yes

• No

Does the graph represent a function?

• Yes

• No

Does the graph represent a function?

• Yes

• No