What is the definition independent variable?

Answer 1

In math, The independent variable is the variable having something done to it.

examples:

a = 2b

b2 + 4 = a

a = 5 - b

In each of these, b is the independent variable and a is the dependent variable. You can make b be whatever you want it to be but a is dependent on what be is set to. In science, the independent variable is the one factor that you change in an experiment.

In a scientific experiment, you change one thing (the independent variable) and measure any consequent change in another thing (called the dependent variable, because its value depends on the independent variable). All other variables must be held constant to avoid confusing the issue.

In practice, the independent variable is either what you alter (such as the acidity, or the temperature) or it is time passing (for example, in an experiment in which you measure the changes in someone's blood sugar levels at various times after eating a meal).

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A factor or phenomenon that causes or influences another associated factor or phenomenon called a dependent variable. For example, income is an independent variable because it causes and influences another variableconsumption. In a mathematical equation or model, the independent variable is the variable whose value is given. In an experiment, it is the controlled condition(that is allowed to change in a systematic manner) whose effect on the behaviorof a dependent variable is studied. Also called controlled variable, explanatory variable, or predictor variable. Refer to Business dictionary for more information.