1.
A linear function that can be written in the form
y
=
kx
, where
k
0, is called a(n)_______.
A.
equivalent variation
B.
direct variation
C.
variable variation
D.
functional variation
Hint
2.
Consider the equation
y
=
kx
. Which statement is
not
true?
A.
k
is called the constant of variation.
B.
k
is called the direction.
C.
x
is called the independent variable.
D.
y
is called the dependent variable.
Hint
3.
The cost of a container of building staples varies directly as the weight in pounds. Suppose 2 pounds of staples costs $3.60. What is the cost of 5 pounds of staples?
A.
$5.25
B.
$1.40
C.
$9.00
D.
$35.00
Hint
4.
Suppose
y
varies directly as
x
and
y
= 42 when
x
= 3. Find
x
when
y
= 70.
A.
1.8
B.
9.8
C.
5
D.
2.5
Hint
5.
Serefina can make 16 paper cranes in 20 minutes. At that rate, how many can she make in two hours?
A.
75 cranes
B.
150 cranes
C.
96 cranes
D.
48 cranes
Hint