Direct vs Inverse Proportion

Which situation involves a direct proportion?

• As the number of miles you travel increases, the amount of petrol in the tank decreases.

• As the amount of ice in a glass decreases as the temperature increases.

• As the number of hours you study increases, the grade you get on your exams increases.

Tags

CCSS.7.RP.A.2D

Identify whether the given relation is Direct or Indirect Proportion?

Area of farmland and the crops harvested.

• Direct Proportion

• Indirect Proportion

Say 'TRUE' or 'FALSE'

The population of a country and the area of land per person are inversely proportional

• TRUE

• FALSE

Identify whether the given relation is Direct or Indirect Proportion?

The number of workers on a job and the time to complete the job

• Direct Proportion

• Indirect Proportion

If 18 drinks cost £54, how much will 7 drinks cost?

• £21

• £18

• £24

• £16

Tags

CCSS.6.RP.A.3B

Jackie cooked 9 burgers in 45 minutes. How many burgers could she cook in an hour and a half?

• 22 burgers

• 15 burgers

• 10 burgers

• 18 burgers

Tags

CCSS.6.RP.A.3B

If it takes 3 mechanics, 20 hours to build a car, how long will it take 4 mechanics?

• 12 hours

• 15 hours

• 10 hours

• 14 hours

Tags

CCSS.6.RP.A.3B

A farmer has enough food to feed 20 animals at his farm for 6 days. How long the food lost if there were 10 more animals in the farm?

• 5 days

• 6 days

• 3 days

• 4 days

Tags

CCSS.6.RP.A.3B

The time to complete a project varies inversely with the number of employees.

If 3 people can complete the project in 7 days, how long will it take 5 people?

• 12 days

• 4.2 days

• 6.2 days

• 10 days

6 pipes fill a tank in 120 minutes, then 5 pipes can fill it in _______ minutes

• 100 
• 174
• 144
• 108

Tags

CCSS.HSA.CED.A.1