Question

For example you have a graph and it says that determine the density of each kind of wood.

You choose ANY point? or what?

Answer 1

do you have an example of the graph? it is difficult to answer without seeing it.

Answer 2

Yes, but the problem is that the graph is a really big one :(

let say that this is the graph:



That's a horrible graph! :P lol sorry! it's really hard to draw in here :( is it clear?