Question 1

The intensity 𝐼 of light produced by a light source varies inversely as the square of the distance 𝑑 from the source is written as

Accepted Answer

$l=\frac{k}{d^2}$

Answer

$l=\frac{k}{d^2}$

Answer

$l=\frac{k}{d^2}$

Answer

𝑑² = 𝑘𝐼

Question 2

The number of kilograms of water 𝑤 in a person’s body varies directly as the person’s mass 𝑚 is written as

Accepted Answer

𝑤 = 𝑘𝑚

Answer

$l=\frac{k}{d^2}$

Answer

$l=\frac{k}{d^2}$

Answer

𝑚 = 𝑘𝑤

Question 3

Which is an example of direct variation?

Accepted Answer

𝑦= −8𝑥

Answer

$l=\frac{k}{d^2}$

Answer

𝑥𝑦 = −8

Answer

$l=\frac{k}{d^2}$

Question 4

if 𝑦 varies directly as 𝑥 and𝑦 = 30 when 𝑥 = 5,find the constant of variation.

Accepted Answer

6

Answer

150

Answer

35

Answer

25

Question 5

Which is an example of inverse variation?

Accepted Answer

$l=\frac{k}{d^2}$

Answer

$l=\frac{k}{d^2}$

Answer

$l=\frac{k}{d^2}$

Answer

$l=\frac{k}{d^2}$

Question 6

If 𝑦 varies inversely as 𝑥 and 𝑦 = 6 when 𝑥 = 12, find the constant of variation

Accepted Answer

72

Answer

18

Answer

2

Answer

6

Question 7

Which of the following describes a direct variation?

Accepted Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/0d32c73fe9bc8369fe803fc336d713d569fb3ac3.PNG

Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/21e76241f56e5cae954e2149c6c42251172076d9.PNG

Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/07a90632303b3763bb9cea7ca2a7c04ccf3fd903.PNG

Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/3f7dc26fbfd3798b53c407ab5ba115b08f9fbdf2.PNG

Question 8

Which of the following describes an inverse variation?

Accepted Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/f95488a6b4f94b90c44e1c46d44f4ae310d6c9bf.PNG

Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/e2cbb3b35ab43f1fd8dde1d70269a207f9ab0962.PNG

Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/9f38b7bdd519cd12a235f8f3eaddea0520a580cb.PNG

Answer

https://uploads.quizalize.com/06cf6632-94b1-41e2-b006-e162e3e85f8d/question/1867675ee1005aa446bd36eeb172b318ec9e638f.PNG

Question 9

Which variation statement describes the graph below?

Accepted Answer

𝑦 varies inversely as 𝑥, where 40 is the constant of variation

Answer

𝑦 varies inversely as 𝑥, where 20 is the constant of variation

Answer

𝑦 varies directly as 𝑥, where 20 is the constant of variation

Answer

𝑦 varies directly as 𝑥, where 40 is the constant of variation

Question 10

Which mathematical equation represents the table of values below

Accepted Answer

𝑦 = 4𝑥

Answer

$l=\frac{k}{d^2}$

Answer

𝑥 = 4𝑦

Answer

$l=\frac{k}{d^2}$

Question 11

If 𝑦 varies directly as 𝑥 and 𝑦 = 120 when 𝑥 = 8, find 𝑦 when 𝑥 = 10. A.

Accepted Answer

150

Answer

96

Answer

15

Answer

80

Question 12

If 𝑦 varies directly as 𝑥 and 𝑦 = 4 when 𝑥 = 10, find 𝑥 when 𝑦 = 12.

Accepted Answer

30

Answer

8

Answer

14

Answer

40

Question 13

If 𝑦 varies inversely as 𝑥 and 𝑦 = 14 when 𝑥 = 3, find 𝑦 when 𝑥 = 6.

Accepted Answer

7

Answer

10

Answer

9

Answer

8

Question 14

If 𝑦 varies inversely as 𝑥 and 𝑦= 9 when $x=\frac{2}{3}$ , find 𝑦 when𝑥 = 1.

Accepted Answer

6

Answer

8

Answer

9

Answer

7

Question 15

The number of days to construct a house varies inversely as the number of workers. It takes 10 days for 6 workers, how many workers is needed to finish the job in 12 days?

Accepted Answer

5

Answer

7

Answer

4

Answer

6

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