How to know if this graph is a function

Question

zarkam21 · Answer

attachment

phi · Answer

use the "vertical line test"

if a straight up/down line only crosses the curve once, then you have a function

(example of *not* a function :   graph of a circle)

zarkam21 · Answer

So true?

zarkam21 · Answer

@misty1212  could you confirm darling xx

zarkam21 · Answer

@mathmate

mathmate · Answer

Please follow the instruction given to you by @phi and make a decision.
I will be glad to confirm answers if they are accompanied by an explanation or justification to show that appropriate work was done.

zarkam21 · Answer

I did do the work here on my scrap paper that is why I said true because according to what I drew up, I see that there is one point for each

psirockin2 · Answer

I'm pretty sure it passes the vertical line test. If there were multiple points on the same vertical line, then we'd have a problem

zarkam21 · Answer

So true right, that's what I was saying the whole time

mathmate · Answer

@zarkam21
`I see that there is one point for each `
is what I wanted to hear.
Yes, the graph represents a function.  Well done!