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A variable changes. It varies.
A non variable does not change. It is constant.
For example if I write a mathematical expression such as x + 1, then x is a variable. Its value can be whatever value we choose. However 1 is a non variable. Its value is 1 and never changes from 1.
In a scientific experiment a variable would be something that you changed from one test to another. A non variable would be something that remained constant from test to test.
As a final example: the speed at which light travels in a vaccum is a constant. It is referred to by the letter c which stands for the universal constant. However, the speed at which your car travels is a variable. It changes.
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∙ 11y ago
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