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 with the same x-ccordinates	D.	a set of ordered pairs
		Hint
	2.	The set of all first coordinates, or x-coordinates, from the ordered pairs in a relation is called the_______.
		A.	related coordinates	B.	ordered coordinates
		C.	domain	D.	range
		Hint
	3.	Which table is represented by the graph?
		A.
		B.
		C.
		D.
		Hint
	4.	The domain and range of the relation shown in the graph are______.
		A.	domain: {-1, 0, 1, 2}; range: {-3, -1, 0, 2}	B.	domain: {2, 1, 0, -1}; range: {-3, -1, 0, 2}
		C.	domain: {-3, -1, 0, 2}; range: {-1, 0, 1, 2}	D.	domain: {3, 1, 0, -2}; range: {-2, -1, 0, 1}
		Hint
	5.	Refer to the graph. Determine the range.
		A.	{2.1, 2.6, 2.7, 3.0, 3.0, 3.7, 4.3, 4.5, 5.4, 5.0}
		B.	{3.1, 3.2, 3.4, 3.6, 3.6, 3.7, 4.3, 4.5, 4.7, 4.8}
		C.	{1984, 1985, 1986, 1987, 1988, 1990, 1993, 1995, 1997, 1999}
		D.	{1982, 1983,1984,1985, 1986, 1987, 1988,1989, 1990, 1991}
		Hint