Question

How do you tell if a graph is a graph of a function again?

Answer 1

I believe all graphs are graphs of functions ;o but usually they will be labeled saying what is being graphed

Answer 2

No. Lol. I mean, how can you look at a graph, and know if it is a graph of a function. There's some kind of test..

Answer 3

Vertical Line test.

Answer 4

its a fairly useless test unless you can draw perfectly vertical lines and assess all points of a graph

Answer 5

That is not the graph of a function. Correct?

Answer 6

This is the graph I was given.

Answer 7

I think it is, just wanted some confirmation.

Answer 8

the graph you posted does "look" like it would pass such a vertical line test

Answer 9

but unless you can draw an infinity of vertical lines and test it at all points along the graph .... its just an assumption

Answer 10

a vertical line has the equation: x = k for some constant k

plugging that into the equation of the function we can then assess the situation that for some k there is more than one value that presents itself

Answer 11

It doesn't give me the equation, just that graph. :p

Answer 12

then the assumption would be that it should pass the vertical line test without ever drawing a single vertical line

Answer 13

Okay. Thanks! God bless! c: