1.	The set of all first coordinates, or x-coordinates, from the ordered pairs in a relation is called the_______.
		A.	related coordinates	B.	range
		C.	ordered coordinates	D.	domain
		Hint
	2.	Which table is represented by the graph?
		A.
		B.
		C.
		D.
		Hint
	3.	The set of solutions to an equation in two variables is called the______.
		A.	identity	B.	domain set
		C.	solution set	D.	range set
		Hint
	4.	Solve the equation 10x - 5y = 15 if the domain is {-2, -1, 0, 1, 2}.
		A.	{(2, -1), (-1, 1), (0, 3), (1, 5), (2, 7)}
		B.	{(-2, -2), (-1, -1), (0, 0), (1, 1), (2, 2)}
		C.	{(-2, 2), (-1, 1), (0, 0), (1, 2), (2, 1)}
		D.	{(-2, -7), (-1, -5), (0, -3), (1, -1), (2, 1)}
		Hint
	5.	Which equation is a linear equation?
		A.	-2x = 5y + 1	B.	xy = 7
		C.	y2 = 9	D.	3x + 3xy + y = 10
		Hint
	6.	A relation in which each member of the domain is paired with exactly one member of the range is called a(n)_______.
		A.	ordered relation	B.	equivalent equation
		C.	function	D.	equivalent relation
		Hint
	7.	The relation {(4, 6), (6, 1), (10, 2), (5, -1), (10, -2), (2, 6)} is _______.
		A.	a function, because each element of the domain is paired with exactly one element of the range	B.	a function, because all of the elements of the domain are positive
		C.	not a function, because the domain value 10 is paired with more than one element of the range	D.	not a function, because the range value 6 is paired with more than one element of the domain
		Hint
	8.	Consider the equation y = kx. Which statement is not true?
		A.	k is called the constant of variation.	B.	y is called the dependent variable.
		C.	x is called the independent variable.	D.	k is called the direction.
		Hint
	9.	Suppose y varies directly as x and y = 42 when x = 3. Find x when y = 70.
		A.	1.8	B.	2.5
		C.	5	D.	9.8
		Hint
	10.	Suppose y varies inversely as x, and y = 9 when x = -4. What is the constant of variation?
		A.	-13	B.	-36
		C.	36	D.	5
		Hint
	11.	Which equation is not a linear equation?
		A.	y = -4	B.	x= 0
		C.	xy + 2 = y	D.	3x = 4y + x
		Hint
	12.	Suppose y varies inversely as x and y = 3 when x = 8. Find y when x = 4.
		A.	12	B.	2
		C.	1.5	D.	6
		Hint