Functions and Non-Function

A relation where every input in matches with exactly one output is called what?

• Relation

• Linear

• Exponential

• Function

Is this mapping a function and how can you tell?

• Yes its a function cause all the numbers have lines

• No it's not a function because there a 5 in both ovals

• No it's not a function because the x value 5 has y values of  2 & 9

• No it's not a function because the y value 5 has x values of  2 & 9

Which of the following guarantees a table will not be a function?

• x value repeats

• y value repeats

• x value repeats and has different y values

• y value repeats and has different x values

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)

• (3,4) (4,-3) (7,4) (3, 8)

• (6,-5) (7, -3) (8, -1) (9, 1)

• (2, -2) (5, 9) (5, -7) (1, 4)

Is this table 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 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 this graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function