1.
An equation of the form
xy
=
k
, where
k
0, is called a(n) _____.
A.
direct variation
B.
inconsistant variation
C.
proportional variation
D.
inverse variation
Hint
2.
Which statement is
not
true about an inverse variation?
A.
The constant of variation is
.
B.
The product of the variables is constant.
C.
In the equation
xy
=
k
,
k
is a constant.
D.
If
y
varies inversely as
x
, then
y
is inversely proportional to
x
.
Hint
3.
Suppose
y
varies inversely as
x
and
y
= 4 when
x
= -2. Find
y
when
x
= 1.
A.
-8
B.
C.
-2
D.
Hint
4.
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.
2 hours
B.
3 hours
C.
6 hours
D.
4 hours
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.
6 m
B.
12 m
C.
4 m
D.
24 m
Hint