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). It emphasizes how to plot points on the plane and interpret their values, and how to calculate the distance between two points by counting blocks in both the horizontal and vertical directions. The x-coordinate tells you have many steps you have to take to the right (positive) or left (negative). The video dives into the concept of using a coordinate plane to solve real-world problems. It's always a good idea to start at the origin. 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.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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