Answer
The term function represents the dependency of one variable on another variable. It says that for a particular value of the input variable, the output variable has a fixed particular value.
Work Step by Step
For example,
If equation $f=2x+1$ then the value of f is dependent on the value of the variable x.And we represent f as$f\left( x \right)$and say that f is a function of x.
The function is written as,
$f\left( x \right)=2x+1$
There will be output value for the every input value. The possible value for which the function is defined is called a domain, and the possible resultant value for the domain values is called range.
