Final answer:
The uppercase Greek letter Delta (Δ) in Mathematics and Science represents a change in a quantity, such as a change in position, by subtracting the initial value from the final value.
Step-by-step explanation:
In the context of Mathematics and Science, the uppercase Greek letter Delta (Δ) is used to denote a change in a certain quantity. This notation signifies a difference between a final and an initial value; for example, Δx represents a change in position, calculated by subtracting the initial position (xo) from the final position (xf). The SI unit for displacement is the meter, but other units such as kilometers or miles may also be used, necessitating unit conversion for accurate calculations.