Constant of Variation and Direct Variation
Authored by Barbara White
Mathematics
7th - 9th Grade
CCSS covered
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20 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality?
y = (21/4)x
k= 21
k= 5.25
k= 4/21
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Write an equation for this relationship.
y=4x
y=1/8x
y=1/4x
y=8x
Tags
CCSS.6.EE.C.9
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The amount of money earned on a job is directly proportional to the number of hours worked. If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?
$2
$308
$1.57
$265
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Is the given table a direct variation? If so, what is the constant?
Yes; 1/4
Yes; 4
Yes; 2
No
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
In a direct variation, y=39 when x=3. Find the value of y when x=2.
26
3
58.5
2
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Is this a direct variation?
y=2x
yes
no
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Does the relationship represent direct variation?
Yes
No
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