If x stands for any of the real numbers from the set R then x is a variable over R.
For example, if x is the over number in an oneday international cricket match of 50 overs then x is a variable over the set {1, 2, 3, 4, ....., 48, 49, 50}.
Suppose, x is the side of a square and y, its area. Clearly, both x and y are variables. AS the side of a square changes, its area changes accordingly by the relation y = x^{2} (by the formula for area of a square). We say x is an independent variable and y is a dependent variable because value of x decides the value of y. Now, this is also true that when y changes, x changes according to the relation x = √y. So, here we can say that y is the independent variable and x is the dependent variable.
Thus, we find that if there is a relation between two variables x, y then one is the independent variable and the other is the dependent variable.
From Independent Variables and Dependent Variables to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.