1.	A relation in which each member of the domain is paired with exactly one member of the range is called a(n)_______.
		A.	ordered relation	B.	function
		C.	equivalent relation	D.	equivalent equation
		Hint
	2.	If any vertical line passes through no more than one point of the graph of a relation, then the relation is a(n)_______.
		A.	equivalent relation	B.	function
		C.	domain relation	D.	straight line
		Hint
	3.	The relation {(4, 6), (6, 1), (10, 2), (5, -1), (10, -2), (2, 6)} is _______.
		A.	not a function, because the domain value 10 is paired with more than one element of the range	B.	a function, because all of the elements of the domain are positive
		C.	a function, because each element of the domain is paired with exactly one element of the range	D.	not a function, because the range value 6 is paired with more than one element of the domain
		Hint
	4.	The relation in the graph is _________.
		A.	not a function because each member of the domain is paired with more than one member of the range
		B.	not a function because each member of the range is paired with more than one member of the domain
		C.	a function because each member of the domain is paired with exactly one member of the range
		D.	a function because each member of the range is paired with exactly one member of the domain
		Hint
	5.	The relation is ___________.
		A.	not a function because it does not pass the vertical line test
		B.	a function because it passes the vertical line test
		C.	a function because it passes the horizontal line test
		D.	not a function because it does not pass the horizontal line test
		Hint