1.	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.	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
	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.	Select the relation that is a function.
		A.	{(5, 10), (-3, 10), (-3, -10), (4, 7)}
		B.	{(-2, -1),(5, -1), (16, 3), (-3, -9)}
		C.	{(21, 11), (21, 10), (21, 9), (21, 8)}
		D.	{(-6, -5), (3, 2), (10, 8), (3, 3)}
		Hint
	4.	Select the relation that is a function.
		A.
		B.
		C.
		D.
		Hint
	5.	Which graph is not a function?
		A.		B.
		C.		D.
		Hint