Directly and Inversely Proportional Relationships

If the time taken to travel a certain distance varies inversely as the speed of travel and it takes 5 hours at a speed of 40 km/h, how long will it take at a speed of 80 km/h?

• 2.5 hours

• 5 hours

• 10 hours

• 20 hours

• 1

• 10

• 0.5

• 2

Which of the following represents inverse proportion?

• 1

• 2

• 3

• 4

A family makes homemade pickles. They pick the pickles at a rate of 80 pickles per 5 jars. Which answer choices best represent packing y pickles in x jars at that rate? Select TWO correct answers.

Direct proportion, inverse proportion or neither?

I have 3 cats who eat a bag of cat food every 4 days. If I get another cat, how long will each bag last?

• Direct

• Inverse

• Neither

Direct proportion, inverse proportion or neither?

Four people lay a pipeline in 5 days. How long would ten people take?

• Direct

• Inverse

• Neither

Which of the following is NOT a characteristic of inverse proportion?

• The product of the variables is constant.

• As one variable increases, the other decreases.

• The variables increase at the same rate.

• 4

• 25

• 100

• 400

Which equation represents inverse proportion where the constant of proportionality is 5?