1.The horizontal axis is called the x-axis
2.vertical axis is called the y-axis
3.The center of the coordinate system (where the lines intersect) is called the origin. The axes intersect when both x and y are zero. The coordinates of the origin are (0, 0).
An ordered pair contains the coordinates of one point in the coordinate system. A point is named by its ordered pair of the form of (x, y). The first number corresponds to the x-coordinate and the second to the y-coordinate.
Read the details about an example of ordered pairs in
EXAMPLE: ( -3, 2), ( -1, 1), ( -1, 3), ( 0,1), ( 1, 5), ( 2, -3)
ANSWER: YES, THERE IS A REPETITION IN THE FIRST COORDINATE AND IN THE SECOND COORDINATE
2. by properties and characteristics