1.
If
w
varies directly as
z
and
w
= 9 when
z
= -6, find
w
when
z
= 3.
A.
4.5
B.
0
C.
-4.5
D.
-2
Hint
2.
If
y
varies directly as
x
and
y
= 2 when
x
= 4, find
x
when
y
= 4.
A.
8
B.
16
C.
2
D.
4
Hint
3.
If
p
varies inversely as
q
and
p
= -8 when
q
= 2, find
p
when
q
= -4.
A.
4
B.
-16
C.
-4
D.
16
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.
-3
C.
2
D.
27
Hint
5.
Suppose
x
varies directly with
y
. If
y
increases by a factor of 2, what will happen to
x
?
A.
It will increase by a factor of 4.
B.
It will decrease by a factor of 2.
C.
It will increase by a factor of 2.
D.
It will decrease by a factor of 4.
Hint