Other Forms of Direct Variation
Authored by Anthony Clark
Mathematics
8th Grade
CCSS covered
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19 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What type of variation does this scenario represent?
The length of time you charge your cell phone
and the battery power
direct propotion
inverse variation
joint variation
none of these
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.
yes, the constant of variation is 1/2
yes, the constant of variation is 2
no, there is constant of variation.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.
yes, the constant of variation is 8.
no, there is no constant of variation
yes, the constant of variation is 1/8
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine if there is a constant of variation. If so, explain what it represents. The equation y = 9.50 x represents the number of dollars y Marty paid for x movie tickets.
The constant of variation is 9.50. This means that Marty paid $9.50 for each movie ticket
There is no constant of variation. There is not a direct variation between the number of tickets and the total cost.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The cost of paper varies directly with the number of reams bought. Suppose 2 reams cost $5.10. Write an equation that could be used to find the cost of x reams of paper.
y= 5.10x
y=2.55x + 2.55
y = 2.55x
2.55y = x
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Recall that the length a spring stretches varies directly with the amount of weight attached to it. A certain spring stretches 5 cm when a 10-gram weight is attached. Write a direct variation equation relating the weight x and the amount of stretch y.
y = 0.5x
y= 2x
y= 5x + 10
y= 2x +5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Determine if the relationship between the two quantities is a direct variation. Explain your reasoning.
yes, the constant of variation is 2
yes, the constant of variation is 1/2
no, there is no constant of variation
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