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* update index.md with article added article for dependent and independent variables. * fix: remove stub info
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Dependent and Independent Variables
Before talking about dependent and independent variables, it would be necessary to define what a variable is.
In simple terms, a variable is any thing that is liable to change. In order words, it is not consistent and does not have a fixed pattern.
In science and mathematics, variables are often used to represent real world quantities that are unknown or can change. For example, if I earn $10 for every hour of work I do, how much I have at the end of the week will be determined by how many hours of work I did during that week. How many hours of work I do and how much I earn are both variables but one of them depends on the other.
An independent variable is one that is changed or controlled in a scientific experiment. It represents the cause or reason for an outcome. The dependent variable variable on the other hand is the variable that is being tested or measured in the experiment.
In the above example, my independent variable is the number of hours of work I do. I have total control over it and directly changing it cahnges the dependent variable, which is how much I would have earned at the end of the week.