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A
direct variation; k = 2
B
direct variation; k =
Option B
C
inverse variation; k =
Option C
D
inverse variation; k = 2
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The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 11 miles? Round your answer to the nearest unit.a.247 unitsb.228 unitsc.264 unitsd.290 units

A
A
B
B
C
C
D
D
3

The quantity q varies inversely with the square of m and directly with the product of r and x. When m is 4 and the product of r and x is 8, q is 2.5. What is the constant of variation?

A
Five-eighths
Option A
B
Five-fourths
Option B
C
5
D
10
4

Which statements about Jakita’s conclusion are true? Select two options.

A
The points actually represent an inverse variation.
B
The k value of the direct variation is actually 2.
C
The ordered pairs can be represented by the function y = .
Option C
D
The ordered pairs can be represented by the function y = .
Option D
E
As one quantity increases, the other also increases.
5

Given that , What is the value of f(x) when x = 2? a. 2.5 c. 1 b. 2 d. 0.5 Please select the best answer from the choices provided

Question illustration
A
A
B
B
C
C
D
D
6

The potential energy of an object varies jointly with the mass of the object and the height of the object off the ground. A 25-kg object has 980 joules of potential energy when it is 4 meters off the ground. Another object has 150 joules of potential energy at 3 meters off the ground. What is the mass of the second object? Round to two decimal places.

A
0.32 kilogram
B
2.88 kilograms
C
5.10 kilograms
D
45.90 kilograms
7

From the graph shown below, what happens to the y- values as the negative x- values get closer to zero? a. They increase c. They stay the same b. They decrease d. cannot be determined from the graph Please select the best answer from the choices provided

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A
A
B
B
C
C
D
D
8

Solve: a. x = 40 c. x = 20 b. x = 10 d. x = 15 Please select the best answer from the choices provided

Question illustration
A
A
B
B
C
C
D
D
9

When x = 2, y = 50 and when x = 4, y = 100. Which direct variation equation can be used to model this function?

A
xy = 100
B
xy = 400
C
y = 25x
D
y = 100x
10

When p = 12, t = 2, and s = , r = 18. If r varies directly with p and inversely with the product of s and t, what is the constant of variation?

Question illustration
A
One-eighth
Option A
B
One-half
Option B
C
Four and one-half
Option C
D
18
11

The kinetic energy, K, of an object varies jointly with its mass, m, and the square of its velocity, v. The mass of an object stays the same, but the velocity of the object is halved. How is the kinetic energy of the object affected?

A
The kinetic energy is quartered.
B
The kinetic energy is halved.
C
The kinetic energy is doubled.
D
The kinetic energy is quadrupled.
12

A landscaper estimates that a set of plants can be installed in 6 hours by 12 workers. The landscaper wants to finish a set of plants in 4 hours. Assuming that the variables are inversely related, how many workers should the landscaper bring to the job?

A
8
B
10
C
14
D
18
13

Which equation represents an inverse variation function that passes through the points (4, 5) and (10, 2)?

A
y =
Option A
B
y =
Option B
C
y = 20x
D
y =
Option D
14

The kinetic energy, K, of an object varies jointly with the mass of the object and the square of the velocity of the object. A 50-kg object moving at a velocity of 20 meters per second has 10,000 joules of kinetic energy. How many joules of kinetic energy does a 25-kg object moving at a velocity of 10 meters per second have?

A
250 joules
B
1,250 joules
C
2,500 joules
D
3,125 joules
15

Solve: a. x = 5 c. x = 20 b. x = 10 d. x = 15 Please select the best answer from the choices provided

Question illustration
A
A
B
B
C
C
D
D
16

The quantity y varies directly as x and inversely as z. When x is 10 and z is 4, y is 15. What is y when x is 20 and z is 6?

A
6
B
20
C
27
D
30
17

For the function defined by , y varies inversely as what quantity? a. c. y b. d. Please select the best answer from the choices provided

Question illustration
A
A
B
B
C
C
D
D
18

A quantity m varies jointly with p and r. When p is 2 and r is 4, m is 1. What is the constant of variation?

A
One-eighth
Option A
B
One-half
Option B
C
2
D
8
19

A quantity a varies inversely as a quantity b, if, when b changes, a changes in the inverse ratio. What happens to the quantity a if the quantity b doubles?a.quantity a triplesc.quantity a stays the sameb.quantity a doublesd.quantity a halves

A
A
B
B
C
C
D
D
20

When h is and j is , g is 4. If g varies jointly with h and j, what is the value of g when h is 2 and j is 3?

Question illustration
A
4
B
6
C
24
D
144

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