Function or Relation

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

Is the graph pictured a function?

• Yes
• No

• Function
• Not a Function

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function 

Function or Relation?
{(-1,2), (-2,4), (2,5), (0,-2), (2,0)}

• Function

• Relation