The notation "f(t)" represents a function, where "f" is the name of the function and "t" is the variable or input. Functions are mathematical relationships that assign each input a specific output. In this case, "t" can take on various values, and "f(t)" will provide the corresponding output based on the rule defined by the function. Functions like "f(t)" are commonly used in various fields, including mathematics, physics, and economics. They help model real-world situations, such as the growth of a population over time or the trajectory of a moving object. Understanding functions is essential for analyzing and predicting behaviors in these disciplines.