Determine the domain range and if a relation is a function

The video tutorial explains the concepts of domain and range, emphasizing that the domain consists of input values (X values) and the range consists of output values (Y values). It guides viewers on how to identify domain and range from a set of coordinates. The tutorial also covers how to determine if a relation is a function by ensuring each domain element maps to a unique range element.

What criteria must be met for a relation to be classified as a function?

Provide an example of a function and explain how you identified it as such.