Function or Not a Function

Is this mapping a function or not a function? 

• Function

• Not a Function

Is the relation a function?

• Yes

• No

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

Look at this graph. Is the relation a function?

• yes

• no

Is this table a function?

• Function

• Not a function

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

• Yes

• No

Is this mapping a function or not a function? 

• Function

• Not a Function 

• Function
• Not a Function

• Function
• Not a Function

In order to be a function the following must be true.

• each x value has only one y value

• each y value has only one x value

• each x  has only one y & each y has only one x 

• each x and y are equal