How to Identify a Function

• Yes
• No

• Yes
• No

• Yes
• No

• Yes
• No

Is this is a function or not a function?

• Function
• Not a Function

Is this a function or not a function?

• Function
• Not a Function

• Yes
• No

Which set of ordered pairs is a function?

• {(9,5), (10,5), (9,-5), (10,-5)}

• {(3,4), (4,-3), (7,4), (3, 8)}

• {(6,-5), (7, -3), (8, -1), (9, 1)}

• {(2, -2), (5, 9), (5, -7), (1, 4)}

• Yes
• No

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