The factors that can be changed by the person performing the experiment can be described as an independent variable. This is a concept that has been brought by mathematical research and studies that date back to ancient times. A dependent variable is the one that shows the results, or outcome of a subject whose variation is under investigation.

In other terms, the values of a dependent variable will always depend on the values of an independent variable. However, the values of a dependent variable will not have any effect on the initial values of an independent variable. This is how they work in mathematical equations.