please explain how do u draw an asymtote ?

and whats the diff btwn set and interval notation? and example plz
thanks

Since this is not my area of expertise, I searched Google under the key words "how to draw asymptotes" to get this:

http://www.google.com/search?client=safari&rls=en&q=how+to+draw+asymptotes&ie=UTF-8&oe=UTF-8

You can find the rest of the information you desire, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.