Which prefix would you associate with increased breathing rate?

The prefix associated with increased breathing rate is "Tachy." In medical terminology, "tachy-" is used to denote an increased rate or speed. When referring to breathing, the term "tachypnea" describes a condition where a person has an abnormally high respiratory rate.

Understanding the context of the other prefixes helps clarify why "Tachy" is the most appropriate choice. "Dys-" refers to difficulty or abnormality, and while it implies a problem with a function, it does not signify an increase in rate. "Hepat-" is related to the liver, and "Cerv-" pertains to the neck or the cervical region, neither of which relate to breathing rates. Thus, "Tachy" clearly stands out as the correct prefix to describe increased breathing rate.