Answer
Yes it can. as long as each first component corresponds to only one second component.
Work Step by Step
Recall: A function is a relation where every first element is paired with only one second element.
$\\\\$A relation in which a second component corresponds to more than one component CAN BE a function as long as every first component is paired with only one second component.
$\\\\$It is perfectly fine to have one second component paired with more than one first component, as long as there is no first component that is paired with more than one second component.