Lined for everything, as a matter of habit.
I don't understand the apparent convention of using graph paper for math. The only reasonable use for the grid lines in math is graphing, and they aren't strictly necessary for making reasonable-looking graphs. If you really need to, draw in some vertical lines.
Of course, that argument is a bit hypocritical because there isn't much of a use for horizontal lines in math problems either, yet I still use lined paper while blithely ignoring the lines.
And now this topic has made me consider the virtues of dashed-lined paper (which I have never seen anywhere; I'm thinking something like a slope field with all horizontal dashes). Why hasn't it been done? Best of all three worlds.
I don't understand the apparent convention of using graph paper for math. The only reasonable use for the grid lines in math is graphing, and they aren't strictly necessary for making reasonable-looking graphs. If you really need to, draw in some vertical lines.
Of course, that argument is a bit hypocritical because there isn't much of a use for horizontal lines in math problems either, yet I still use lined paper while blithely ignoring the lines.
And now this topic has made me consider the virtues of dashed-lined paper (which I have never seen anywhere; I'm thinking something like a slope field with all horizontal dashes). Why hasn't it been done? Best of all three worlds.