1.
If
y
varies directly as
x
and
y
= 21 when
x
= 5, find
x
when
y
= 42.
A.
4.2
B.
5
C.
21
D.
10
Hint
2.
Jim's wages vary directly as the numbers of hours he works. For 7 hours, he makes $38.85. How much will he make in 37 hours?
A.
$205.35
B.
$1437.45
C.
$207.20
D.
$194.25
Hint
3.
A direct variation equation has (-2, 4) and (
n
, -8) as solutions. Find the missing value.
A.
1
B.
4
C.
16
D.
-2
Hint
4.
Use the direct variation equation
y
= 22
x
to find
x
when
y
= 88.
A.
B.
x
= 4
C.
D.
x
= -4
Hint
5.
If Dale Jarrett drives his car 1760 feet on the racetrack in 6 seconds, about how long will it take him to drive 2640 feet, a half mile?
A.
18 minutes
B.
18 seconds
C.
9 seconds
D.
6 minutes, 40 seconds
Hint