# 1.13: Functions on a Cartesian Plane

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**Basic**Created by: CK-12
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quadrant

quadrant

A quadrant is one-fourth of the coordinate plane. The four quadrants are numbered using Roman Numerals I, II, III, and IV, starting in the top-right, and increasing counter-clockwise.Cartesian Plane

Cartesian Plane

The Cartesian plane is a grid formed by a horizontal number line and a vertical number line that cross at the (0, 0) point, called the origin.Coordinate Plane

Coordinate Plane

The coordinate plane is a grid formed by a horizontal number line and a vertical number line that cross at the (0, 0) point, called the origin. The coordinate plane is also called a Cartesian Plane.Function

Function

A function is a relation where there is only one output for every input. In other words, for every value of , there is only one value for .### Image Attributions

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Learn how graphs represent functions.

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## Date Created:

Feb 24, 2012## Last Modified:

Feb 26, 2015## Vocabulary

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