Function/Nonfunction

Is this mapping a function or not a function? 

• Function
• Not a Function

Is this graph a function or not a function? 

• Function 
• Not a Function

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Is this set of ordered pairs a function and how can you tell?

• Yes its a function because no y values repeat
• No it's not a function because there are negative numbers
• No it isn't a function because an x value repeats but has different y values 
• No it isn't a function because an y value repeats but has different x values

.

• Function
• Not a Function

Is the relation a function?{(1,5),(1,7),(3,9),(4,11)}

• Yes
• No

Look at this graph. Is the relation a function?

• yes

• no

Is this mapping a function or not a function? 

• Function
• Not a Function 

Is this table a function and how can you tell?

• Yes its a function because there are not variables for missing numbers
• No it's not a function because the y value 4 repeated
• No it isn't a function because the x value 2 is repeated
• No it's not a function because the x value 5 has y values of  10 & 12

The following set of ordered pairs IS a function:

{(2,3) (6,1) (0,3) (4, 2)}.

How do you know?

• None of the x values repeat.

• None of the y values repeat.