Write the equation that represents this variation.
y=151x
y=200x
y=200/x
y=120/x
2. Multiple Choice
15 minutes
1 pt
The amount of money earned on a job varies directly with the number of hours worked. If $85.00 is earned in 6 hours, how much is earned in 32 hours of work?
$453
$3
$85
$443
3. Multiple Choice
15 minutes
1 pt
When Darcy's school bus travels at 30 miles per hour, it gets from her home to school in 12 minutes. What is the speed of Darcy's bus if it makes the same trip in 18 minutes?
45 mph
36 mph
28 mph
20 mph
4. Multiple Choice
15 minutes
1 pt
If y varies inversely as x and x=5 when y=20, then what is the constant of variation, k?
121
4
100
6
5. Multiple Choice
15 minutes
1 pt
The amount of interest (I) owed on a loan varies directly with the length of time (t) of the loan. If k is the constant of proportionality, which formula represents this relationship?
t= kI
I= k/t
I= kt
t=k/I
6. Multiple Choice
15 minutes
1 pt
On a treasure map, the actual distance is directly related to the scaled distance. If 15 miles is represented by 3 centimeters, then how many centimeters on the treasure map are equivalent to 135 miles?
27
45
23
47
7. Multiple Choice
15 minutes
1 pt
The formula d=1080t, describes the distance, d, in feet, you are from a storm's center if it takes t seconds for you to hear the thunder. What type of variation does this describe?
Direct
Inverse
8. Multiple Choice
15 minutes
1 pt
The time, y, to finish loading the boxes varies inversely as the number of people, x, working. If 10 people work, the job is completed in 16 hours. What is the constant of variation?
16
160
10
1.6
9. Multiple Choice
15 minutes
1 pt
The amount of a paycheck vs. the number of hours worked.
Direct
Inverse
Neither
10. Multiple Choice
15 minutes
1 pt
x = 16/y
Direct
Inverse
Neither
11. Multiple Choice
15 minutes
1 pt
8x - 2y = 2
Direct
Inverse
Neither
12. Multiple Choice
15 minutes
1 pt
Which set of ordered pairs satisfies an inverse variation?
(6,3) and (8,4)
(4,-2) and (-5,10)
(2,3) and (4,5)
(2,6) and (-3,-4)
13. Multiple Choice
15 minutes
1 pt
Which two of these equations represent an inverse variation? x+2y=14 2x+y=0 y= 30/x 2y=-x 4y=x 2y=10/x