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So, if I take the limit of x when x tends to zero, what do I get?

well, I need two known points to draw a straight line, this is clear, but when this straight line is drawn, there in an infinite number of points connecting the two points I have connected together. for example f(x) = 2x + 5 f(0) = 5 f(1) = 7 now, connect these two points on the graph...

That was helpful, thanks a lot all

From that point of view, there is no real point? because no matter how small that point is, it can be seen as a straight line from other point of view?

Hi My thought might be a bit weird or maybe childish, but I can not find anything to object it or to prove that it is wrong. As a basic definition of a straight line that it is an infinite number of points that are connected together. Regardless the length of that straight line, it consists...