Identify Functions from a Graph with Vertical Lines

Is this graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function

Which graph does NOT pass the vertical line test?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Is this graph a function or not a function? 

• Function

• Not a Function

Tags

CCSS.8.F.A.1

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

Which graph is NOT a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

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; there is a line connecting the dots.

Is the graph showing a function?

• Yes

• No

When a vertical line crosses the line of a function ​ (a)   the relation ​ (b)   a function.​ ​

• more than once

• is not

• never

Which graph does NOT pass the vertical line test?

In other words, which graph is NOT a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4