Answer:
Functional.
Step-by-step explanation:
As the exercise explains, a functional relationship is the relationship between a change in an independent variable and an associated change in a dependent variable. Behaviorists are typically concerned with discovering the relationship between changes in environmental events and changes in behavior. For example, the relationship between time and distance; the functional relationship is given when, to move from point A to point B, not only the distance is taken into account but the time.