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Coordinate graph with numbers3/21/2024 If you remember from earlier chapters the domain contains values that correspond to the independent variable whereas the range contains values corresponding to the dependent variable. The first coordinate (usually the x-coordinate) is called the domain and the second (usually the y-coordinate) is called the range. And then do the same but following a horizontal line to find the y-coordinate.Ī relation is a set of ordered pairs. Begin at the point and follow a vertical line either up or down to the x-axis. To find out the coordinates of a point in the coordinate system you do the opposite. And the y-coordinate tells you have many steps to move up (positive) or down (negative). The x-coordinate tells you have many steps you have to take to the right (positive) or left (negative). These two number lines define a flat surface called a plane, and each point on this plane is associated with an ordered pair of real. The horizontal number line is called the x x -axis, and the vertical number line is called the y y -axis. It's always a good idea to start at the origin. The rectangular coordinate system consists of two real number lines that intersect at a right angle. To graph a point one draws a dot at the coordinates that corresponds to the ordered pair. Exactly one ordered pair of numbers names a given point in the plane. Coordinate pairs are written as (x, y) with the x and y representing real numbers on the graph.Exactly one point in the plane is named given the numbers of the ordered pair and.The completeness property for points in the plane tells us two things The first number corresponds to the x-coordinates and the second to the y-coordinate. The axes divide the plane into four quadrants.Ī point in a coordinate plane is named by its ordered pair of the form of (x, y). These lines are perpendicular and intersect at their zero points. As you remember from pre-algebra a coordinate plane is a two-dimensional number line where the vertical line is called the y-axis and the horizontal is called the x-axis.
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