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.	Select the relation that is a function.
		A.	{(-6, -5), (3, 2), (10, 8), (3, 3)}
		B.	{(21, 11), (21, 10), (21, 9), (21, 8)}
		C.	{(5, 10), (-3, 10), (-3, -10), (4, 7)}
		D.	{(-2, -1),(5, -1), (16, 3), (-3, -9)}
		Hint
	3.	Select the relation that is a function.
		A.
		B.
		C.
		D.
		Hint
	4.	Which relation is not a function?
		A.	{(1, 1), (2,2), (3, 3)}
		B.	{(-2, 1), (2, 3), (6, 5)}
		C.	{(2, 4), (3, 5), (2, 7)}
		D.	{10, 0), (2, 4), (-2, 4)}
		Hint
	5.	Which of the following is (are) true about functions?
		A.	All of these	B.	Functions pass the vertical line test.
		C.	Functions are relations.	D.	In a function, each member of the domain is paired with one and only one member of the range.
		Hint