Please answer?!plz ans plz ans

Someone . me. compound probability

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241. a) 0 b) 1 c) 2 d) 1 2