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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.
Compare dependent variable (def 2), control variable (def 1).
Origin of independent variable
1850-1855
First recorded in 1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for independent variable
Historical Examples
• Pains and pleasures give us what mathematicians call the 'independent variable.'

Leslie Stephen
• An ordinary differential equation involves only one independent variable, a partial differential equation involves more than one.

Various
• In other words, mind cannot exist as an "independent variable" in the world; it must always accompany a human brain.

Hereward Carrington
• Let x be the independent variable, y the correlative variable which depends upon it.

Auguste Comte
British Dictionary definitions for independent 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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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independent 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
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### Difficulty index for independent variable

Few English speakers likely know this word

### Word Value for independent

15
19
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