# Algebra Understanding Direct Variation Quiz

8 Questions | Total Attempts: 571  Settings  .

• 1.
Which of the following is NOT true about direct variation?
• A.

Direct Variation is y = k/x

• B.

Direct variation is y = kx

• C.

Direct variation always passes through the origin (0,0)

• D.

Direct variation has a constant of proportionality, k.

• 2.
Y is directly proportional to x. If y = 16 when x = 4, write the formula to represent this relation of y and x.
• A.

Y = 4x

• B.

Y = (1/4)x

• C.

Y = 12x

• D.

Y = 20x

• 3.
Assume y varies directly as x.  If y = 20 and x  = 4, find y when x = 9.
• A.

Y = 9/5

• B.

Y = 180

• C.

Y = 14

• D.

Y = 45

• 4.
If y = 15 when x = 2, then y = 10 when x = 8.  True or False?
• A.

True

• B.

False

• 5.
The amount of money raised at a charity fundraiser is directly proportional to the number of attendees. The amount of money raised for 5 attendees was \$100. How much money will be raised for 60 attendees?
• A.

\$80

• B.

\$6,000

• C.

\$1,200

• D.

\$12,000

• 6.
Katherine sells 75% of the cupcakes that she sells at her bakery.  Which term would correctly describe which part of the direct variation equation 75% would represent?
• A.

Y variable

• B.

X variable

• C.

Constant of variation

• D.

Product

• 7.
Which of the following is the correct equation for the following if y varies directly as x? x =3 and y = 4.
• A.

Y = (3/4)x

• B.

Y = (4/3)x

• C.

Y = 1x

• D.

Y = -1x

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