Respuesta :

The dependent variable is the one on the Y (vertical) axis
The independent variable is the one on the X (horizontal) axis

OH OH OH
i just remembered, in 6th or 7th grade, my science teacher gave us a way to remember which is which.

DRY MIX
DRY - Dependent (Responding) is on the axis
MIX - Manipulated (Independent) is on the axis

Hope this helps!