A midpoint divides the line segment exactly in half. This fact can be used to figure out the formula for a midpoint of a line segment in a 2-dimensional Euclidean space such as a Cartesian coordinate system. The x-coordinate of the midpoint will be halfway between the x-coordinates of the two points, and the y-coordinate of the midpoint will be halfway between the y-coordinates of the two points. The formula for the midpoint of a
This is an image from this resource on the Internet4Classrooms' "Sixth Grade Interactive Math Skills - Coordinate Plane" resource page: Graphing Ordered Pairs. Lesson with interactive practice on graphing and locating ordered pairs on a grid. Ordered pairs are useful in representing relationships between two sets of data, in the form of a graph. These can then be represented by points on a grid known as the Cartesian Coordinate System in 2-D.