A Multivariable Function is a function that takes multiple inputs and produces a single output. These functions are essential in various fields such as physics, engineering, and economics, where systems often depend on several variables. For example, the temperature in a room can depend on factors like time of day, humidity, and the number of people present. In mathematical terms, a multivariable function can be expressed as f(x, y, z), where x, y, and z are the input variables. Understanding these functions allows for the analysis of complex systems and the optimization of processes, making them a crucial part of advanced mathematics and applied sciences.