A two-dimensional grid of horizontal and vertical lines used to locate points.

• A. Graph
• B. Matrix
• C. Coordinate Plane
• D. Layout

Answer: (C)

The coordinate plane is the two‑dimensional surface formed by the intersection of a horizontal axis (x-axis) and a vertical axis (y-axis), creating a grid of perpendicular lines. This grid lets you locate any point by its ordered pair (x, y): how far to the right or left from the origin along the x-axis, and how far up or down along the y-axis. That exact idea—a perpendicular grid used to identify locations by coordinates—is what the term describes.

A graph, while drawn on this plane, is a representation of a relationship or function, not the grid itself. A matrix is just a rectangular array of numbers, not a plane used to locate points. A layout refers to arrangement and design, not a mathematical grid.