Mathematics. a variable in a functional relation whose value is determined by the values assumed by other variables in the relation, as y in the relation y = 3 x^{2} .
British Dictionary definitions for dependent variable
dependent variable
noun
1.
a variable in a mathematical equation or statement whose value depends on that taken on by the independent variable: in "y = f(x)", "y'"is the dependent variable
2.
(psychol, statistics) the variable measured by the experimenter. It is controlled by the value of the independent variable, of which it is an index
(dĭ-pěn'dənt) In mathematics, a variable whose value is determined by the value of an independent variable. For example, in the formula for the area of a circle, A = πr^{2}, A is the dependent variable, as its value depends on the value of the radius (r). Compare independent variable.