A two-dimensional surface on which points are plotted using pairs of numbers.

A two-dimensional surface on which points are plotted using pairs of numbers.

• A. Graph Paper
• B. Cartesian Plane
• C. Number Line
• D. Coordinate Grid

Answer: (D)

The main idea here is the system used to map points with a pair of numbers in two dimensions. Each point is given by an ordered pair (x, y), where x is how far to move along the horizontal direction and y is how far to move along the vertical direction. The coordinate grid provides the grid of perpendicular lines that lets us locate these pairs: the intersection of the vertical line x = value and the horizontal line y = value marks the point. This grid is the framework that makes plotting coordinates intuitive and precise, with the origin where the axes cross. While graph paper refers to the material and a Cartesian plane is another common name for the same idea, describing it as a coordinate grid emphasizes the grid used to plot coordinate pairs.

The main idea here is the system used to map points with a pair of numbers in two dimensions. Each point is given by an ordered pair (x, y), where x is how far to move along the horizontal direction and y is how far to move along the vertical direction. The coordinate grid provides the grid of perpendicular lines that lets us locate these pairs: the intersection of the vertical line x = value and the horizontal line y = value marks the point. This grid is the framework that makes plotting coordinates intuitive and precise, with the origin where the axes cross. While graph paper refers to the material and a Cartesian plane is another common name for the same idea, describing it as a coordinate grid emphasizes the grid used to plot coordinate pairs.