The coordinates or points on a rectangular coordinate graph represent
quantities. You can plot a large number of points in a compact space to show
several related quantities. Show the coordinates on the graph as a pair of
numbers placed inside parentheses and separated by a comma. List the
x-coordinate first, followed by the y-coordinate. If the point has a letter
designator, for example P (point), place it to the left outside of the
Figure 2-14 shows a rectangular coordinate graph with designated points.
Figure 2-14. The coordinates of point P.
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