This is really confusing me. I know how to get the general shape. For example, I know that when the derivative is zero, there must be a minimum or maximum in the original function since the slope at that point is zero. But how do I know the position. If the derivative graph at x=2 is 3, what does that tell me about the function? It just tells me the slope, but that position could be anywhere, couldn't it? How can I tell the position?