Function vs Non-Functions

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

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Is this mapping a function or not a function? 

• Function
• Not a Function

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Is this set of ordered pairs a function or not a function? 

• Function
• Not a Function 

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Is this graph a function or not a function? 

• Function 
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function 

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Is this set of ordered pairs a function or not a function? 

• Function
• Not a Function 

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Is the graph pictured a function?

• Yes
• No

.

• Function
• Not a Function

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Is this set of ordered pairs a function or not a function? 

• Function
• Not a Function 

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• Function
• Not a Function