What does the test describe that involves examining a relationship between two things, called variables that make prediction about the way users will perform with an interface?

Hypotheses.

Explanation:

Hypotheses:-It is a theory that is temporarily accepted to interpret certain phenomena or event, and to provide direction for investigation yet to come. A hypothesis can be proved correct or wrong, and must be capable of dis confirmation.If it remains validated by facts, it is said to be corroborated.

well you didnt give us any options it looks like so im going to go with because cash cant be traced.