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Coordinate Geometry
For each of the following ordered pairs, state the quadrant in which the point falls, or the axis on which the point falls.

1.   (x, y) if x × -1 is negative and y is negative	2.   (19, -7)
3.   (0, 10)	4.   (4, 19)
5.   (x, y) if x is negative and y is negative	6.   (-10, -15)
7.   (-12, 26)	8.   (x, y) if xy > 0 and x < y and y is positive
9.   (x, y) if x < 0 and y > 0	10.   (27, 0)
11.   (3, 18)	12.   (x, y) if xy > 0 and x > y and y is positive
13.   (-13, -14)	14.   (0, 3)
15.   (-9, 8)	16.   (x, y) if x is positive and y is positive
17.   (x, y) if x × -1 is negative and y is positive	18.   (x, y) if x > 0 and y > 0