Δ (Change) is a symbol commonly used in mathematics and science to represent a difference or change in a quantity. It signifies the difference between two values, such as the change in temperature, distance, or time. For example, in physics, Δt might represent the change in time, while Δx could indicate a change in position. In broader contexts, Δ can also refer to changes in various fields, such as economics, where it might denote shifts in market trends or prices. Understanding Δ is essential for analyzing data and making informed decisions in disciplines like mathematics, science, and economics.