Coordiante+Planes

= ﻿ = __What Is a Coordinate Plane?__


 * Coordinate Planes- A plane in which a horizontal number line and a vertical number line intersect at their zero points **.

**The Quadrents of the Coordinate Plane! ** Quadrent #1 is the top right. The coordinates end up being +

Quadrent #2 is the top left. The coordinates are + and -

Quadrent #3 is the bottom left. The coordinates are both -

Quadrent #4 is the bottom right. the coordinates are – and +

** __Example Time!!!__ **
· Start at the origin. · Move left to find the //x//-coordinate of point //R//, which is –3. · Move up to find the //y//-coordinate, which is 2.

So, the ordered pair for point //R// is (–3, 2). ** Example 2 Graph an Ordered Pair **

**Graph and label the point //D//(4,** –**3).**

· Draw a coordinate plane. · Move 4 units to the right. Then move 3 units down. · Draw a dot and label it //D//(4, –3).

//History// //René Descartes (1596-1650)// // The French philosopher, mathematician, and scientist Rene Descartes, was one of the most important and influential thinkers in history. Descartes founded analytic geometry and originated the Cartesian coordinates and Cartesian curves. The coordinate plane is often called the Cartesian plane. // __ Examples and Presentations __ __ [] __ __ [] __ __ [] __ __ Games __ __ [] __ __ [] __