1.	Choose the relation that is a function.
		A.		B.
		C.		D.
		Hint
	2.	The temperature f(x) of water in a lake in degrees Fahrenheit is estimated by the function shown below, where x is the depth in feet of the water. What would be the temperature of water 30 feet below the surface?
		A.	63°F	B.	33°F
		C.	71.25°F	D.	111°F
		Hint
	3.	Find the domain of the relation shown in the graph.
		A.	{-3, -2, -1, 0, 1, 3}	B.	{0, 1, 2, 3}
		C.	{-3, -2, -1, 0, 1, 2, 3, 5}	D.	{-2, -1, 1, 2, 3, 5}
		Hint
	4.	Is the relation shown in the graph a function? Why or why not?
		A.	No, the relation contains the ordered pairs (3, -1) and (3, 2).
		B.	Yes, the relation contains very few ordered pairs.
		C.	No, the relation contains the ordered pairs (0, -1) and (3, -1).
		D.	Yes, the ordered pairs (-3, 2), (-1, 1), and (3, -1) form a straight line.
		Hint
	5.	Given find
		A.	-6	B.	3
		C.	-3	D.	6
		Hint