The "Rate of Change" refers to how much a quantity changes over a specific period of time. It is often used in mathematics and science to describe the speed at which one variable changes in relation to another. For example, in physics, the rate of change of position over time is known as velocity. In everyday life, the rate of change can be observed in various situations, such as the increase in temperature throughout the day or the growth of a plant over weeks. Understanding the rate of change helps us analyze trends and make predictions based on how quickly or slowly things are changing.