Calling all cars that have removable roofs \"convertibles\" is an example of: .

Calling all cars that have removable roofs \"convertibles\" is an example of this "labeling practice". This i a common practice of people where they label something in simpler terms or words that is easily retained in the mind. In this case, cars with roofs that can be removed are termed convertibles.

Using the rise/run rule. you would get 2/6.simp. 1/3