Q: In a controlled scientific study, what do you call a factor that can take on different values?


Read this paragraph and choose the correct option from the provided answers:

An experiment is a controlled scientific study of specific variables. A variable is a factor that can take on different values. For example, the speed of an object down a ramp might be one variable, and the steepness of the ramp might be another.

 Choices:

- output

- input

- vector

- variable


A:
variable