1.
If
y
varies directly as the cube of
x
and
y
= 30 when
x
= 2, find
x
when
y
= 468.75.
A.
7
B.
5
C.
9
D.
3
Hint
2.
If
y
varies inversely as
x
and
y
= 12 when
x
= 7, find
x
when
y
= 2.
A.
42
B.
7
C.
10
D.
5
Hint
3.
Use
y
=
to find the value of
y
when
x
= 14.
A.
28
B.
8
C.
56
D.
98
Hint
4.
If
y
varies inversely as the cube of
x
and
y
= 8 when
x
= 2, find
x
when
y
= 1.
A.
x
= 4
B.
x
= 1
C.
x
= 2
D.
x
= 8
Hint
5.
Which best describes this graph?
A.
direct variation
B.
none of these
C.
inverse variation
D.
joint variation
Hint