Quiz about Direct/Inverse Variation

Question 1

Which of the following represents direct variation?

Accepted Answer

y = kx

Answer

y = k/x

Answer

y = x/k

Answer

y = mx + b

Question 2

Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

Accepted Answer

y=5.25x

Answer

y=1344x

Answer

y=100x

Answer

y=4/21x

Question 3

Write an equation for this relationship.

Accepted Answer

y=1/4x

Answer

y=4x

Answer

y=1/8x

Answer

y=8x

Question 4

Is the given table a direct variation? If so, what is the constant?

Accepted Answer

No

Answer

Yes; 1/4

Answer

Yes; 4

Answer

Yes; 2

Question 5

Is this a direct variation?
y=2x

Accepted Answer

yes

Answer

no

Question 6

Is this proportional?

Accepted Answer

no

Answer

yes

Question 7

Is this proportional?

Accepted Answer

no

Answer

yes

Question 8

Which of the given graphs is a direct variation?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 9

What ordered pair does a direct variation always go through when graphed?

Accepted Answer

(0, 0)

Answer

(1, 0)

Answer

(0, 1)

Answer

(1, 1)

Question 10

What is the constant of proportionality (in miles per hour) based on the table?

Accepted Answer

45

Answer

90

Answer

135

Answer

2

Question 11

Determine the type of variation:

Accepted Answer

Inverse

Answer

Direct

Answer

Neither

Question 12

Which of the following represents inverse variation?

Accepted Answer

y = k/x

Answer

y = kx

Answer

y = x/k

Answer

y = mx + b

Question 13

If y varies inversely as x and x=5 when y=20, then what is the constant of variation, k?

Accepted Answer

100

Answer

121

Answer

4

Answer

6

Question 14

Is the given table a direct or inverse variation? What is the constant of variation?

Accepted Answer

Inverse, 12

Answer

Direct, 12

Answer

Direct, 1/12

Answer

Inverse, 1/12

Question 15

Assume y varies inversely with x. If x=7 when y=4, what is y when x=2 ?

Accepted Answer

14

Answer

4

Answer

7

Answer

28

Direct/Inverse Variation

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