1.	Is the relation whose graph is shown below a function?
		A.	Yes; Each element of the range is unique.	B.	Yes; It passes the vertical line test.
		C.	No; It does not pass the vertical line test.	D.	No; The ordered pairs on not on one line.
		Hint
	2.	Determine whether the graph is a function. Explain.
		A.	The graph does not provide enough information.	B.	No, because there are two elements in the domain that are paired with the same element in the range.
		C.	Yes, the graph passes the vertical line test.	D.	No, the graph fails the vertical line test.
		Hint
	3.	Select the relation that is a function.
		A.
		B.
		C.
		D.
		Hint
	4.	Which of the following is (are) true about functions?
		A.	All of these	B.	Functions are relations.
		C.	Functions pass the vertical line test.	D.	In a function, each member of the domain is paired with one and only one member of the range.
		Hint
	5.	Functions can be expressed using which of these?
		A.	tables	B.	graphs
		C.	ordered pairs	D.	all of these
		Hint