Is It a Function

Does this mapping diagram represent a function?

• No, because an input value goes to multiple output values

• Yes, because each input goes to one and only one output

Is this mapping a function or not a function? 

• Function

• Not a Function 

Is this mapping a function or not a function? 

• Function

• Not a Function

• Function
• Not a Function

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function

• Not a Function

Which set of values is a function?

• (1,5) (2,5) (1,-5) (2,-5)

• (3,10) (5,-3) (7,4) (3, 8)

• (6,1) (7, 2) (8, 2) (9, 1)

• (1, -2) (5, 8) (5, -7) (3, 4)

Function

Not a Function

• Function

• Not a Function

Is this a function?

• Yes, it is a function.

• No, it is not a function.

Which set of values is not a function?

• (9,5) (10,5) (4,-5) (8,-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)