Identifying Functions Mapping Diagrams

Does this represent a function?

• Yes

• No

• A

• B

• C

• D

Does this represent a function?

• Yes

• No

• A

• B

• C

• D

Is this mapping diagram a function or not a function?

• Function

• Not a Function

Does this mapping diagram represent a function?

• It is not a function, because an input value goes to multiple output values

• It is a function, because each input goes to one and only one output

• It is not a function, because three of the inputs are mapped to the output 0.

• It is a function because all of the input values change by 1.

Does the mapping diagram show y as a function of x?

• Yes

• No

• I'm Confused

• May I phone a friend?

Is the relation in the mapping diagram a function?

• Function

• Not a Function

Is the mapping diagram showing a function?

• No

• Yes

• Function because each input is paired with exactly one output.

• Not a function

• Not a function because the input of 1 is paired with two outputs, 1 and -1.