1.	Is the relation whose graph is shown below a function?
		A.	Yes; It passes the vertical line test.	B.	Yes; Each element of the range is unique.
		C.	No; The ordered pairs on not on one line.	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.	No, because there are two elements in the domain that are paired with the same element in the range.
		B.	Yes, because each element in the domain is paired with exactly one element in the range.
		C.	No, because there is an element in the domain that is paired with two elements in the range.
		D.	Yes, because every relation is a function.
		Hint
	3.	Determine whether the graph is a function. Explain.
		A.	No, because there are two elements in the domain that are paired with the same element in the range.	B.	No, the graph fails the vertical line test.
		C.	The graph does not provide enough information.	D.	Yes, the graph passes the vertical line test.
		Hint
	4.	Which relation is not a function?
		A.	{(-2, 1), (2, 3), (6, 5)}
		B.	{(1, 1), (2,2), (3, 3)}
		C.	{(2, 4), (3, 5), (2, 7)}
		D.	{10, 0), (2, 4), (-2, 4)}
		Hint
	5.	Which graph is not a function?
		A.		B.
		C.		D.
		Hint