Maths/Excel type question

[crisbduck]

I have a series of scatter graph lines, ideally they would all be on top of each other but aren't so is there something like regression number I could use to show how different they are? Cheers!

 

[semi-pro waster]

I'm afraid from your description I'm having difficulty working out what you want from this - do you mean you've just got a graph but not the underlying figures? If you've got the figures then I'd suggest making the various lines a percentage of another i.e. say you've chosen row 10 as your baseline then what is in row 10 divided by what is in the rows you want to compare with - then you can either present it as a set of percentage variations or alternatively make another graph from it.

If that's not the sort of thing you're talking about then I think you need to make it a bit clearer.