Funciones reales

Funciones reales are mathematical relationships where each input, a real number, corresponds to exactly one output, also a real number. Think of them like a machine: you put a real number in, and the machine gives you back a unique real number as a result. They are used to model various phenomena in fields like physics, economics, and engineering, such as predicting speed over time or calculating costs based on quantities. The key idea is that for every input, there's one, and only one, output, allowing precise analysis and prediction.