Inverse Proportion

If y is inversely proportional to x and y=2 when x=6, find y when x=15.

• 0.8

• 1.5

• 3

• 5

If x is inversely proportional to y and x=10 when y=4, find the value of x when y=0.4.

• 100

• 75

• 50

• 25

t is inversely proportional to v

t=2 when v=6

Find the equation for t and v

• t = ¹²/_v

• t = ¹/₃ v

• t = ³/_v

• t = 12v

If z is inversely proportional to ∛w and z=5 when w=8,

find the value of w when z=100.

• 1

• 0.1

• 0.01

• 0.001

48 men were deployed to construct a bridge in 30 days.

How many days does it take for 8 men to construct the same bridge?

• 5

• 10

• 180

• 200

Tags

CCSS.6.RP.A.3B

48 men were deployed to construct a bridge in 30 days.

How many days does it take for 16 men to construct 2 identical bridges?

• 150

• 160

• 180

• 190

Tags

CCSS.6.RP.A.3B

The cost per person to rent a mountain cabin is inversely proportional (varies inversely) to the number of people who share the rent. If the cost is $36 per person when 5 people share, what is the cost per person when 8 people share?

• $22.50
• $57.60
• $1.11
• $12.50

The time it takes to fly from Los Angeles to New York varies inversely as the speed of the plane. If the trip takes 6 hours at 900 km/h, how long would it take at 800 km/h?

• 5.33 hours 
• 6.75 hours 
• 12 hours 
• 10 hours 

The number of hours to paint a house varies inversely with the number of painters working. A 2400-square foot house can be painted in 27 hours by 6 painters. How many painters would need to work in order to paint the house in 18 hours?

• 8 painters
• 10 painters
• 9 painters
• 11 painters

At Sec 2 camp, there is sufficient food for 48 students to last 6 days. If 12 students are absent from the camp, how many more days can the food last?

• 2

• 4

• 6

• 8

Tags

CCSS.6.RP.A.3B