Instead, the function is defined to be that point right over there. If I were to ask you what is the limit of f of x as x approaches 5, you might think of it pretty intuitively. Well, let's see. The closer I get to 5, the closer f of x seems to be getting to 10. The closer I get to 5, the closer f of x seems to be getting to 10. You might fairly intuitively make the claim that the limit of f of x as x approaches 5 really is equal to 10. It looks that way.