1.	Choose the relation that is a function.
		A.		B.
		C.		D.
		Hint
	2.	In a science experiment, students hung a cup from a spring and measured the length of the spring when candies were added to it. Their data are shown in the table below. Which statement is true?
		A.	The relation is a function because for each x value, there is exactly one y value.
		B.	The relation is not a function because there are two y values for some x values.
		C.	The relation is not a function because only a line can be a function.
		D.	The relation is a function because the range values increase.
		Hint
	3.	Given the function f(x) = x2 + 9, find f(-3).
		A.	0	B.	18
		C.	6	D.	12
		Hint
	4.	Find the domain of the relation shown in the graph.
		A.	{-2, -1, 1, 2, 3, 5}	B.	{0, 1, 2, 3}
		C.	{-3, -2, -1, 0, 1, 2, 3, 5}	D.	{-3, -2, -1, 0, 1, 3}
		Hint
	5.	Is the relation shown in the graph a function? Why or why not?
		A.	Yes, the ordered pairs (-3, 2), (-1, 1), and (3, -1) form a straight line.
		B.	No, the relation contains the ordered pairs (3, -1) and (3, 2).
		C.	Yes, the relation contains very few ordered pairs.
		D.	No, the relation contains the ordered pairs (0, -1) and (3, -1).
		Hint