Function or Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function

Is this graph a function or not a function? 

• Function 
• Not a Function

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

Is the graph pictured a function?

• Yes
• No

.

• Function
• Not a Function

• Function
• Not a Function

Which graph does NOT pass the vertical line test?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

.

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function