1.
If
y
varies inversely as
x
and
y
= 15 when
x
= 3, find
y
when
x
= 9.
A.
5
B.
15
C.
3
D.
45
Hint
2.
Which of the following is not an example of inverse variation?
A.
the distance covered if several different people drive 200 miles to the game at variable speeds
B.
the number of running plays a football team can run if they elect to use 2 running backs for 8 plays each, or 1 running back for 16 plays
C.
the number of computers a company gives if it has enough computers to give 24 people 1 computer, or 12 people two computers
D.
the number of samples a store can give away if they give 1 free sample to each of 300 people, or decide to give 2 samples to 300 people
Hint
3.
Which of the following is not true concerning inverse variation?
A.
As
y
increases,
x
decreases
B.
There is some nonzero constant
k
such that
x
y
=
k
C.
x
1
y
1
=
x
2
y
2
D.
Its graph is defined for
x
= 0.
Hint
4.
If
y
varies inversely as
x
and
y
= 14 when
x
= 3, what is
x
when
y
= 84?
A.
B.
2
C.
6
D.
28
Hint
5.
What is the constant of variation if
y
varies inversely as
x
, and
x
= 4.3 when
y
= 2.15?
A.
9.245
B.
2
C.
0.108
D.
Hint