dependent variable

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 . Compare independent variable ( def 1 ).
Statistics. (in an experiment) the event studied and expected to change when the independent variable is changed. Compare independent variable ( def 2 ), control variable ( def 1 ).

1850–55 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dependent variable
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

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American Heritage
Science Dictionary
dependent variable   (dĭ-pěn'dənt)  Pronunciation Key 
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 = πr2, A is the dependent variable, as its value depends on the value of the radius (r). Compare independent variable.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The independent variable of one function is the dependent variable of the other.
Thus, it is neither normally distributed nor has a linear relationship to my
  dependent variable.
It is only a mathematically dependent variable.
This variable (gender) and many others enjoys covariate, not causal relations
  with the dependent variable.
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