Question

Does the following arrow diagram represents a function?

(Enter 1 for True, 0 for False)

Answer 1

A function is a set of ordered pairs in which each $x$-element is from the first set and has only ONE $y$-element associated with it from the Set $B$.
The given arrow diagram from $A$ to $B$ is not a function because $6$ from Set $A$ is associated with both $7,8$ from Set $B$.