1.	Is the relation whose graph is shown below a function?
		A.	Yes; It passes the vertical line test.	B.	No; The ordered pairs on not on one line.
		C.	Yes; Each element of the range is unique.	D.	No; It does not pass the vertical line test.
		Hint
	2.	Determine whether the relation {(7, 2), (-10, 3), (-5, -1), (7, 3)} is a function. Explain.
		A.	Yes, because each element in the domain is paired with exactly one element in the range.
		B.	No, because there are two elements in the domain that are paired with the same element in the range.
		C.	Yes, because every relation is a function.
		D.	No, because there is an element in the domain that is paired with two elements in the range.
		Hint
	3.	Determine whether the relation 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
	4.	Functions can be expressed using which of these?
		A.	tables	B.	graphs
		C.	all of these	D.	ordered pairs
		Hint
	5.	Which graph is not a function?
		A.		B.
		C.		D.
		Hint