Analytic Geometry - The orthonormal system

A coordinate system is a two-dimensional number line, for example, two perpendicular number lines or axes.

The horizontal axis is called the x-axis and the vertical axis is called the y-axis

The center of the coordinate system (where the lines intersect) is called the origin. The axes intersect when both x and y are zero. The coordinates of the origin are (0, 0).

An ordered pair contains the coordinates of one point in the coordinate system. A point is named by its ordered pair of the form of (x, y). The first number corresponds to the x-coordinate and the second to the y-coordinate.

To graph a point, you draw a dot at the coordinates that corresponds to the ordered pair. It's always a good idea to start at the origin. The x-coordinate tells you how many steps you have to take to the right (positive) or left (negative) on the x-axis. And the y-coordinate tells you have many steps to move up (positive) or down (negative) on the y-axis.

[alejandro.grando]

Thank you miss I have finals and brevet and u helped

[zainabalmousa]

ما حدا ابيقدر يدفع ليش ما بتسوها مجانيه