1.
An equation of the form
xy
=
k
, where
k
0, is called a(n) _____.
A.
inconsistant variation
B.
direct variation
C.
proportional variation
D.
inverse variation
Hint
2.
Suppose
y
varies inversely as
x
, and
y
= 9 when
x
= -4. What is the constant of variation?
A.
5
B.
-36
C.
-13
D.
36
Hint
3.
Alice and Gertrude take 8 hours to mow a lawn. If everyone mows the lawn at the same speed as Gertrude and Alice, how long would it take 4 people to mow a lawn?
A.
6 hours
B.
2 hours
C.
3 hours
D.
4 hours
Hint
4.
Suppose y varies inversely as
x
and
y
= 3 when
x
= 8.
Find
y
when
x
= 4.
A.
12
B.
2
C.
6
D.
1.5
Hint
5.
The formula for the area of a rectangle is
A
=
lw
. The two rectangles have the same area. Find the length of the second rectangle.
A.
4 m
B.
12 m
C.
6 m
D.
24 m
Hint