Identify Functions from a Graph with Vertical Lines

Is this graph a function or not a function? 

• Function

• Not a Function

To Be A Function:

Each​ (a)   is paired with ONE​ (b)   !

Graph must pass the ​ (c)   (VLT)

(NO two points can be lined up vertically)

Table can have ​ (d)  

(NO x-value paired w/2 different y-values)

• X

• Y

• Vertical Line Test

• No Repeat X's

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 a function or not a function?

• Function

• Not a function

Is this a function or not a function?

• Function

• Not a function

Is the graph showing a function?

• No

• Yes

You can identify a function from a graph by using the.....

• Horizontal Line Test

• Eye Test

• Vertical Line Test

• Diagonal Line Test

Which graph represents a function?

• 
• 
• 
• 

Is the graph shown a function? Why or why not?

• Yes, because the graph represents a relation between an input and an output.

• Yes, because each output corresponds to one input.

• No, because the function has negative values.

• No, because each input does not correspond to only one output.

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.

• Yes, because each x-value has only one y-value paired with it.

• No, because the x-value 11 has two y-values pair with it.

• No, because each x-value has only one y-value paired with it.