Well, if I understand you correctly, you are attempting to study the relationship between footsize and height and see how they correlate e.g. is it a directly proportional relationship? In otherwords, as the footsize get larger, does the height necessarily increase?
In this case, your independent variable is footsize and your dependent variable is height. *Hint* Think of it as the height depending on the size of the foot. Graphically, you can even plot footsize on the x-axis and height on the y-axis.
Science Buddies Staff