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independent variable

noun
1.
Mathematics. a variable in a functional relation whose value determines the value or values of other variables, as x in the relation y = 3 x 2 .
Compare dependent variable (def 1).
2.
Statistics. (in an experiment) a variable that is intentionally changed to observe its effect on the dependent variable.
Origin
1850-1855
1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in-dependent variable

independent variable

noun
1.
Also called argument. a variable in a mathematical equation or statement whose value determines that of the dependent variable: in y = f(x), x is the independent variable
2.
(statistics) Also called predictor. the variable which an experimenter deliberately manipulates in order to observe its relationship with some other quantity, or which defines the distinct conditions in an experiment See also experimental condition
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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in-dependent variable in Science
independent variable
  (ĭn'dĭ-pěn'dənt)   
In mathematics, a variable whose value determines the value of other variables. For example, in the formula for the area of a circle, A = πr2, r is the independent variable, as its value determines the value of the area (A). Compare dependent variable.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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