Identify Functions (Vertical Line Test)

Is this graph a function?

• Yes

• No

Is this graph a function?

• Yes

• No

Is this a function? Explain.

• Yes; it passes the horizontal line test.
• No; it is not a straight line.
• Yes; it passes the vertical line test.
• No; it does not pass the vertical line test

Is the relation a function?

• Function
• Not a Function

Is this graph a function or not a function? 

• Function 
• Not a Function 

Does the graph represent a function?

• Yes, because the vertical line test shows there are no repeating input values
• No, because the vertical line test shows there are repeating input values

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

Is this graph a function or not a function? 

• Function
• Not a Function

Is this relation a function?

• Yes
• No