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1.2: Relations
https://math.libretexts.org/Bookshelves/Precalculus/Precalculus_(Stitz-Zeager)/01%3A_Relations_and_Functions/1.02%3A_Relations
All of Precalculus can be thought of as studying sets of points in the plane. With the Cartesian Plane now fresh in our memory we can discuss those sets in more detail
2.2: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Courses/Las_Positas_College/Book%3A_College_Algebra/02%3A_Equations_and_Inequalities/2.02%3A_The_Rectangular_Coordinate_Systems_and_Graphs
Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the...Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the $y$ -axis. This system, also called the rectangular coordinate system, is based on a two-dimensional plane consisting of the $x$ -axis and the $y$ -axis. Perpendicular to each other, the axes divide the plane into four sections. Each section is called a quadrant.
2.1: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Courses/Chabot_College/Chabot_College_College_Algebra_for_BSTEM/02%3A_Equations_and_Inequalities/2.01%3A_The_Rectangular_Coordinate_Systems_and_Graphs
Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the...Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the $y$ -axis. This system, also called the rectangular coordinate system, is based on a two-dimensional plane consisting of the $x$ -axis and the $y$ -axis. Perpendicular to each other, the axes divide the plane into four sections. Each section is called a quadrant.
1.1: Graphing a Linear Equation
https://math.libretexts.org/Bookshelves/Applied_Mathematics/Applied_Finite_Mathematics_(Sekhon_and_Bloom)/01%3A_Linear_Equations/1.01%3A_Graphing_a_Linear_Equation
Equations whose graphs are straight lines are called linear equations. A line is completely determined by two points. Therefore, to graph a linear equation we need to find the coordinates of two point...Equations whose graphs are straight lines are called linear equations. A line is completely determined by two points. Therefore, to graph a linear equation we need to find the coordinates of two points. This can be accomplished by choosing an arbitrary value for x or y and then solving for the other variable.
2.1: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Courses/College_of_the_Desert/Math_10%3A_College_Algebra/02%3A_Equations_and_Inequalities/2.01%3A_The_Rectangular_Coordinate_Systems_and_Graphs
Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the...Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the $y$ -axis. This system, also called the rectangular coordinate system, is based on a two-dimensional plane consisting of the $x$ -axis and the $y$ -axis. Perpendicular to each other, the axes divide the plane into four sections. Each section is called a quadrant.
2.1: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Courses/Angelo_State_University/Finite_Mathematics/02%3A_Equations_and_Inequalities/2.01%3A_The_Rectangular_Coordinate_Systems_and_Graphs
In this section, we will learn how to use grid lines to describe locations and changes in locations.
1.8: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Courses/Reedley_College/College_Algebra_1e_(OpenStax)/01%3A_Algebra_Review/1.08%3A_The_Rectangular_Coordinate_Systems_and_Graphs
Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the...Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the $y$ -axis. This system, also called the rectangular coordinate system, is based on a two-dimensional plane consisting of the $x$ -axis and the $y$ -axis. Perpendicular to each other, the axes divide the plane into four sections. Each section is called a quadrant.
2.1: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Courses/Prince_Georges_Community_College/MAT_1350%3A_Precalculus_Part_I/02%3A_Equations_and_Inequalities/2.01%3A_The_Rectangular_Coordinate_Systems_and_Graphs
Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the...Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the $y$ -axis. This system, also called the rectangular coordinate system, is based on a two-dimensional plane consisting of the $x$ -axis and the $y$ -axis. Perpendicular to each other, the axes divide the plane into four sections. Each section is called a quadrant.
2.1: Lines, slope and intercepts
https://math.libretexts.org/Bookshelves/Precalculus/Precalculus_(Tradler_and_Carley)/02%3A_Lines_and_Functions/2.01%3A_Lines_slope_and_intercepts
In this chapter we will introduce the notion of a function. Before we give the general definition, we recall one special kind of function which is already familiar to the student. More precisely, we s...In this chapter we will introduce the notion of a function. Before we give the general definition, we recall one special kind of function which is already familiar to the student. More precisely, we start by recalling functions that are given by straight lines.
1.2: Relations
https://math.libretexts.org/Courses/Lorain_County_Community_College/Book%3A_Precalculus_(Stitz-Zeager)_-_Jen_Test_Copy/01%3A_Relations_and_Functions/1.02%3A_Relations
All of Precalculus can be thought of as studying sets of points in the plane. With the Cartesian Plane now fresh in our memory we can discuss those sets in more detail
2.2: The Rectangular Coordinate Systems and Graphs
https://math.libretexts.org/Bookshelves/Algebra/College_Algebra_1e_(OpenStax)/02%3A_Equations_and_Inequalities/2.02%3A_The_Rectangular_Coordinate_Systems_and_Graphs
Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the...Descartes introduced the components that comprise the Cartesian coordinate system, a grid system having perpendicular axes. Descartes named the horizontal axis the $x$ -axis and the vertical axis the $y$ -axis. This system, also called the rectangular coordinate system, is based on a two-dimensional plane consisting of the $x$ -axis and the $y$ -axis. Perpendicular to each other, the axes divide the plane into four sections. Each section is called a quadrant.

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