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