## Real Functions: Constant Functions

An constant function is a function that always returns the same constant value. In other words, the constant function is the function

*f*(

*x*) =

*c.*

An example of data for the constant function expressed in tabular form is presented below:

x | −999 | −10 | 0 | π | 5 | 100 | 9999 |

f (x) | c | c | c | c | c | c | c |

An graphical example of the constant function f(x) = 5 is depicted below: