Variables are classified in terms of their relationship with one another. It is customary to talk about dependent variables and independent variables. Dependent variable is a variable that depends on one or more than one independent variables. Dependent variables are observed and their values presumed to depend on the effects of the independent variables.

Dependent variables are truly dependent upon the independent variables.

In the research process, a dependent variable is one that is the focus of the research. Dependent variables are thought to be influenced by other variables to behave in a certain way.

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**Example: **Find the value of m in the equation $m = 4x + 8x^2 - 5$ when $x = 6$

**Solution:**

$m = 4x + 8x^2 - 5$

In this equation m is depend upon $x$, So $m$ is a dependent variable and x is independent variable.

Substitute the value of $x$

$m = 4 \times 6 + 8 \times 6^2 - 5$

Solving the equation we get,

$m = 24 + 288 - 5$

$m = 307$

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