is all about who wants to buy supply has to do with who wants to sell so from these two pieces of information, we can draw a graph like so, with axes, A and B, and label them like so so there. next we can work out a problem. if i have three apples and you take one, how many apples do i have left? apples and you take one, how many apples do i have left? is that demand, or is that supply? actually we can’t really say...