Horisontaalifunktio

Horisontaalifunktio is a term used in some contexts to describe a function that maps input values to a consistent output value, regardless of the specific input. This means that for any two different inputs, say $x_1$ and $x_2$, the output of the function $f$ will be the same: $f(x_1) = f(x_2)$. Such a function is also commonly referred to as a constant function.

A common example of a horisontaalifunktio is a function that always returns the number 5, regardless of what number you input. If the input is 3, the output is 5. If the input is -10, the output is still 5. Mathematically, this can be represented as $f(x) = c$, where $c$ is a constant.

The graph of a horisontaalifunktio on a Cartesian coordinate system is a horizontal line. This line is parallel to the x-axis and is located at the y-coordinate corresponding to the constant output value. The domain of a horisontaalifunktio is typically all real numbers, while its range consists of only a single value, the constant output. These functions are fundamental in mathematics and appear in various fields of study, including algebra, calculus, and computer science.