May 2013
Intermediate to advanced
748 pages
14h 14m
English
Let XOX′ and YOY′ be two fixed perpendicular lines in the plane of the paper. The line OX is called the axis of X and OY the axis of Y. OX and OY together are called the coordinate axes. The point O is called the origin of the coordinate axes. Let P be a point in this plane. Draw PM perpendicular to XOX′. The distance OM is called the x-coordinate or abscissa and the distance MP is called the y-coordinate or ordinate of the point P.

If OM = x and MP = y then (x, y) are called the coordinates of the point P. The coordinates of the origin O are (0, 0). The lines XOX′ and YOY′ divide the plane into ...
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