Identifying Functions

• Function

• Not a Function

• Function

• Not a Function

• Function

• Not a Function

Is the graph pictured a function?

• Yes

• No

Which of the following is 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.

Which graph is NOT a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Which set of ordered pairs 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)}