![]() The x‐coordinate shows the right or left direction, and the y‐coordinate shows the up or down direction. Also, note that the first number in the ordered pair is called the x ‐coordinate, or abscissa, and the second number is the y ‐coordinate, or ordinate. On the y‐axis, numbers above 0 are positive and below 0 are negative. Notice that on the x‐axis numbers to the right of 0 are positive and to the left of 0 are negative. Some coordinates are noted in Figure 2.įigure 2. The point of intersection of the two number lines is called the origin and is represented by the coordinates (0, 0).Įach point on a plane is located by a unique ordered pair of numbers called the coordinates. The other is vertical and is called the y ‐axis. One axis is horizontal and is called the x ‐axis. In coordinate graphs (see Figure 1), two perpendicular number lines are used and are called coordinate axes. These numbers represent the placement of the point relative to two intersecting lines. In the same way, each point in a plane is assigned a pair of numbers. Each point on a number line is assigned a number. Quiz: Linear Inequalities and Half-PlanesĬoordinate geometry deals with graphing (or plotting) and analyzing points, lines, and areas on the coordinate plane (coordinate graph).Solving Equations Containing Absolute Value.Inequalities Graphing and Absolute Value.Quiz: Operations with Algebraic Fractions.Quiz: Solving Systems of Equations (Simultaneous Equations).Solving Systems of Equations (Simultaneous Equations).Quiz: Variables and Algebraic Expressions.Quiz: Simplifying Fractions and Complex Fractions.Simplifying Fractions and Complex Fractions.Quiz: Signed Numbers (Positive Numbers and Negative Numbers).Signed Numbers (Positive Numbers and Negative Numbers).Quiz: Multiplying and Dividing Using Zero.Quiz: Properties of Basic Mathematical Operations.Properties of Basic Mathematical Operations.Swap the x coordinate of C with the y-coordinate of D. Swap the y-coordinate of B with the x-coordinate of D. Swap the x-coordinate of B with the y-coordinate of D. Swap the x-coordinate of B with the y-coordinate of C. ![]() Swap the y-coordinate of A with the x-coordinate of D. Swap the x-coordinate of A with the y-coordinate of B. You can also swap coordinates in the following 9 ways: You can always swap the y-coordinates of the points in the first and second quadrant (x2), the y-coordinates of the points in the first and third quadrant (x2), both (x2), swap the x-coordinates of the points in the first and fourth quadrant (x2), swap the x-coordinates of the points in the second and third quadrant (x2), or – again – both (x2), to get another solution. However, since you need 8 coordinates and 0 can’t be any of them, your points will always end up with the same 8 numbers as coordinates: Conditional Probability & the Rules of Probability.Making Inferences and Justifying Conclusions.Interpreting Categorical and Quantitative Data.Expressing Geometric Properties with Equations.Similarity, Right Triangles, and Trigonometry.Linear, Quadratic, and Exponential Models.Reasoning with Equations and Inequalities.Arithmetic w/ Polynomials & Rational Expressions.
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