Identifying Functions from Mapping Diagrams

Which of the following does NOT represent a function?

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Does this graph represent a function? Explain why or why not. [Hint: look carefully at the dots.]

• Yes, each input has exactly one output.

• No, there are infinite inputs with an output of 2.

• No, 3 has two different outputs.

• No, the graph does not have a consistent slope.

Consider the graph. Which of the following are true statements about the equation represented by the graph? Check all that apply.

• It is a function

• It is not a function

• An input of 1 has an output of 1

• An input of 1 has an output of 3

• An input of 2 has an output of 2

Does the following graph represent a function?

• Yes, because each input has exactly one output.

• Yes, because each output comes from exactly one input.

• No, because there are multiple inputs.

• No, because there are multiple outputs.

• A

• B

• C

• D

• Function
• Not a Function

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function

• Not a Function

• Function
• Not a Function

• A

• B

• C

• D