1.
An equation of the form
xy
=
k
, where
k
0, is called a(n) _____.
A.
inconsistant variation
B.
inverse variation
C.
proportional variation
D.
direct variation
Hint
2.
Suppose
y
varies inversely as
x
and
y
= 4 when
x
= -2. Find
y
when
x
= 1.
A.
-8
B.
-2
C.
D.
Hint
3.
In the formula
d
=
rt
, the time
t
varies inversely as the rate
r
. A racing motorcycle traveling at 96 miles per hour completed one lap around a track in 1.5 minutes. How fast was the motorcycle traveling if it completed the next lap in 1.2 minutes?
A.
120 mph
B.
168.5 mph
C.
76 mph
D.
171.5 mph
Hint
4.
Which statement is
not
true about a direct variation?
A.
y varies directly as
x
.
B.
The constant of variation is
.
C.
y
is inversely proportional to
x
.
D.
The graph is straight line.
Hint
5.
Suppose y varies inversely as
x
and
y
= 3 when
x
= 8.
Find
y
when
x
= 4.
A.
2
B.
12
C.
6
D.
1.5
Hint