1.
If
y
varies directly as
x
and
y
= 6 when
x
= 2, find
y
when
x
= 5.
A.
6
B.
15
C.
D.
2.4
Hint
2.
If
y
varies jointly as
x
and
z
and
y
= 12 when
x
= 2 and
z
= 3, find
y
when
x
= - 3 and
z
= 0.5.
A.
-3
B.
2
C.
-18
D.
27
Hint
3.
The amount of work done by James and his relative distance to Samuel is inversely related. When James is 6 feet away from Samuel, he can get 13 assignments done per hour. How many assignments can James get done when he is 52 feet away from Samuel?
A.
59 assignments
B.
24 assignments
C.
1.5 assignments
D.
112.7 assignments
Hint
4.
Suppose
r
varies jointly with
p
and
q
. If
p
increases and
q
decreases, what will happen to
r
?
A.
It stays the same.
B.
Cannot be determined from given information.
C.
It decreases.
D.
It increases.
Hint
5.
Suppose
x
varies directly with
y
. If
y
increases by a factor of 2, what will happen to
x
?
A.
It will decrease by a factor of 4.
B.
It will increase by a factor of 2.
C.
It will decrease by a factor of 2.
D.
It will increase by a factor of 4.
Hint