# What are independent and dependent variables?

A symbol that doesn't have a fixed value is called a variable in Math. It can take any value.

## Answer: In any equation, the variable that represents the input is called an independent variable and the variable that represents the output is called a dependent variable

Let us understand more about independent and dependent variables.

**Explanation:**

Let us understand the nature of independent and dependent variables with an example:

- 2x + y = 9 ⇒ y = 9 - 2x

Here if we change the value of the variable x then the value of y is also impacted.

- If x = 1 ⇒ y = 9 - 2(1) = 7
- If x = 0 ⇒ y = 9 - 2(0) = 9
- If x = -2 ⇒ y = 9 - 2(-2) = 9 + 4 = 13

Therefore, the value of y is dependent on the value of x.

The variable for which we input the values is called an independent variable. The variable which represents the output value is called the dependent variable.