Two numbers that show location on a grid are called what?

• A. Ordered Number Pair
• B. Coordinate Pair
• C. Grid Reference
• D. Vector

Answer: (A)

Two numbers that show location on a grid are coordinates, read in a specific order. This pair tells you exactly where a point sits: the first number shows how far to move along the horizontal axis (left or right), and the second shows how far to move along the vertical axis (up or down). Because the order matters, this is called an ordered pair of numbers, often also referred to as a coordinate pair. If you swap the two numbers, you reach a different location, which is why the order is essential. A grid reference is more like a map labeling system, and a vector describes direction and length, not just a single point. So the idea is captured by the concept of an ordered pair of coordinates.