A Function Plotter is a tool used to visualize mathematical functions by creating graphs. It takes a function, such as y = x^2 or y = sin(x), and generates a visual representation of how the function behaves over a specified range of values. This helps users understand the relationship between variables and identify key features like intercepts, maxima, and minima. Function plotters can be found in various forms, including software applications, online tools, and graphing calculators. They are commonly used in fields like mathematics, engineering, and science to aid in analysis and problem-solving, making complex concepts more accessible.