Question

State, whether the following relations are functions or not. { (a, b), (b, c), (c, d), (d, e) }. Type 1 if they are function and 0 if they are not

Answer 1

A function is a set of ordered pairs in which each x-element has only ONE y-element associated with it.
Since no two-ordered pairs have same first first component, it is a function .