How would I determine if this is a function?

Question

NeverAlone · Answer

attachment

Astro · Answer

"Determining whether a relation is a function on a graph is relatively easy by using the vertical line test. If a vertical line crosses the relation on the graph only once in all locations, the relation is a function. However, if a vertical line crosses the relation more than once, the relation is not a function." https://sciencing.com/ways-tell-something-function-8602995.html#:~:text=Determining%20whether%20a%20relation%20is,relation%20is%20not%20a%20function.

Joe348 · Answer

Wait so it is a function or not?

Astro · Answer

That is what you would do, but do you need help figuring out how to do it?

NeverAlone · Answer

I do.

NeverAlone · Answer

So, this graph is a function right?

Joe348 · Answer

Hold on let me ask my math teacher

MusicGeek · Answer

It is a function because each input has exactly one and only one output.

Astro · Answer

@musicgeek wrote:

It is a function because each input has exactly one and only one output.

Exactly

Astro · Answer

Does that make sense @neveralone

Joe348 · Answer

my teacher agrees

minustempo · Answer

any linear equation that is not a vertical line is a function
passes vertical line test

NeverAlone · Answer

Yes it does. Thank you.

Astro · Answer

Anytime and thank you to @Musicgeek