5.1 Identifying 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

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

Which of the following is a function?

• 
• 
• 
• 

Which graph is NOT a function?

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

Which graph is a function?

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