1.	If w varies directly as z and w = 9 when z = -6, find w when z = 3.
		A.	-4.5	B.	4.5
		C.	0	D.	-2
		Hint
	2.	If y varies directly as x and y = 2 when x = 4, find x when y = 4.
		A.	4	B.	8
		C.	16	D.	2
		Hint
	3.	If y varies inversely as x and y = 3 when x = 3, find y when x = 4.
		A.	1	B.	2.25
		C.	4	D.	3.5
		Hint
	4.	If y varies jointly as x and z and y = 12 when x = 2 and z = 3, find y when x = - 3 and z = 0.5.
		A.	-18	B.	27
		C.	-3	D.	2
		Hint
	5.	Suppose p varies jointly as r and t. If p = 1 when r = -5 and t = 2, find t when p = 6 and r = 12.
		A.	-6.4	B.	-7.2
		C.	-5.4	D.	-5
		Hint