A researcher wants to know if taking increasing amounts of ginkgo biloba will result in increased capacities of memory ability for different students. They administer it to the students in doses of 250 milligrams, 500 milligrams, and 1000 milligrams. The amount of ginkgo will be plotted on the .

The amount of ginkgo will be plotted on the explanatory variable.

Explanation:

The amount of ginkgo is the explanatory variable of this experiment. An explanatory variable is one that represents a variable that can be considered independent, but is affected by other variables. This type of denomination arose because, as a rule, independent variables cannot be affected by the action of other experimental elements, however, there are experiments, such as the one shown in the question above, where the independent variable can be affected. In this case, the independent variable is called the explanatory variable.