Thank you, gentlemen, for these tips.
As usual, there's a bit more to the story. My daughter is working on graphing in algebra and I thought this would be a good practical exercise for her. I'm all in favor of plotting with software but it's hard to beat a little experience doing things by hand.
I'll check out that graph paper supplier, and I'll look into printing out some custom graph paper via a CAD printer. If the task proves too onerous I imagine we'll resort to punching the numbers into some graphing software!
Thanks!
Patrick