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
= 4 when
x
= -2. Find
y
when
x
= 1.
A.
-2
B.
C.
-8
D.
Hint
3.
Suppose
y
varies inversely as
x
, and
y
= 9 when
x
= -4. What is the constant of variation?
A.
-36
B.
5
C.
36
D.
-13
Hint
4.
Which statement is
not
true about a direct variation?
A.
y
is inversely proportional to
x
.
B.
y varies directly as
x
.
C.
The graph is straight line.
D.
The constant of variation is
.
Hint
5.
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.
4 hours
C.
6 hours
D.
3 hours
Hint