@bbhoho44 24 June 2020 more from that month

Cartesian Plane

This idea was developed by mathematician and philosopher **Rene Descartes** who was called by many as Cartesius. The Cartesian Plane has two lines intersecting at one point (0,0) forming a perpendicular line. These two lines are: X axis also known as *abscissa* which is the horizontal line*.* Y axis also known as *ordinate* which is the vertical line In this Plane, we have positive and negative values. The negative values start with point (0,0) to any number on the x axis that goes to the left of 0 and to any number on the y axis that goes below 0. While the positive values start with point (0,0) to any number on the x axis that goes to the right of 0 and to any number on the x axis that goes above 0. This plane has 4 quadrants: Quadrant 1 has positive values of x and y Quadrant 2 has negative values of x and positive values of y Quadrant 3 has negative values of x and y Quadrant 4 has positive values of x and negative values of y We use the Cartesian Plane to mark a point on a graph according to its coordinates. The coordinates are always in ordered pair following this order: (x, y) This is a very important lesson because this plane is used in most branches of mathematics :)