1.	Determine whether the relation {(7, 2), (-10, 3), (-5, -1), (7, 3)} is a function. Explain.
		A.	Yes, because every relation is a function.
		B.	Yes, because each element in the domain is paired with exactly one element in the range.
		C.	No, because there are two elements in the domain that are paired with the same element in the range.
		D.	No, because there is an element in the domain that is paired with two elements in the range.
		Hint
	2.	Select the relation that is a function.
		A.
		B.
		C.
		D.
		Hint
	3.	Which of the following is (are) true about functions?
		A.	Functions pass the vertical line test.	B.	All of these
		C.	In a function, each member of the domain is paired with one and only one member of the range.	D.	Functions are relations.
		Hint
	4.	Functions can be expressed using which of these?
		A.	ordered pairs	B.	graphs
		C.	all of these	D.	tables
		Hint
	5.	Which graph is not a function?
		A.		B.
		C.		D.
		Hint