Functions from Mappings

• 9
• 3
• 5
• √15

Is this mapping a function or only a 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) }

• 
• 
• 
• 

If the graph of f(x) goes through (1, 4) and (4, 6), what points does the graph of f^-1(x) go through?

• (1, 4) and (4, 6)

• (-4, -1) and (-6, -4)

• (-1, -4) and (-4, -6)

• (4, 1) and (6, 4)

Does this represent a function?

• Yes

• No

How can you determine if a table or ordered pairs represents a function?

• for every y-value there is only one x-value

• for every x-value there is only one y-value

• vertical line test

• for every x-value there is more than one y-value

Do these tables show a function and its inverse?

• yes

• no

• no way to tell

Is the mapping diagram an example of a function?

• yes

• no

• A

• B

• C

• D

Do these mappings show a function and its inverse?

• No

• Maybe

• Yes

• There is not enough information to tell