1.	In mathematics, a relation is _______.
		A.	a set of ordered pairs in which every x-coordinate equals every  y-coordinate	B.	a set of ordered pairs with the same y-coordinates
		C.	a set of ordered pairs	D.	a set of ordered pairs with the same x-ccordinates
		Hint
	2.	The set of all second coordinates, or  y-coordinates, of the ordered pairs in a relation is called the______.
		A.	range	B.	related coordinates
		C.	domain	D.	ordered coordinates
		Hint
	3.	The domain and range of the relation shown in the graph are______.
		A.	domain: {-3, -1, 0, 2}; range: {-1, 0, 1, 2}	B.	domain: {-1, 0, 1, 2}; range: {-3, -1, 0, 2}
		C.	domain: {2, 1, 0, -1}; range: {-3, -1, 0, 2}	D.	domain: {3, 1, 0, -2}; range: {-2, -1, 0, 1}
		Hint
	4.	Choose the tables that expresses {(-3, 4), (-1, -5), (0, 2), (2, 3), (3, -4)}.
		A.		B.
		C.		D.
		Hint
	5.	Refer to the graph. Determine the range.
		A.	{1982, 1983,1984,1985, 1986, 1987, 1988,1989, 1990, 1991}
		B.	{3.1, 3.2, 3.4, 3.6, 3.6, 3.7, 4.3, 4.5, 4.7, 4.8}
		C.	{2.1, 2.6, 2.7, 3.0, 3.0, 3.7, 4.3, 4.5, 5.4, 5.0}
		D.	{1984, 1985, 1986, 1987, 1988, 1990, 1993, 1995, 1997, 1999}
		Hint