Direct and Inverse Proportion

The number of teeth and the age of a person vary

• directly with each other

• inversely with each other

• neither directly nor inversely with each other

• sometimes directly and sometimes inversely with each other.

As the number of workers increase, the job will take less time to complete is ---------

Is the given table a direct variation? If so, what is the constant of proportionality?

• Yes; 1/4

• Yes; 4

• Yes; 1/2

• No

If 18 women can reap a field in 7 days, in what time can 6 women reap the same field ?

• 15 days

• 21 days

• 30 days

• 36 days

A machine in a soft drink factory fills 600 bottles in 5 hours. How many bottles will it fill in 2 hours ?

• 120

• 150

• 180

• 240

If an amount of food last for 40 days for 120 men, how long will it last for 80 men at the same rate ?

• 50 days

• 60 days

• 80 days

• 100 days

If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 5/2 kilograms?

• 520

• 500

• 750

• 820

Is the following statement is inverse proportion or direct proportion?

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

• direct

• inverse

• none

• both

Is the following statement is inverse proportion or direct proportion?

The time taken for a fixed journey and the speed of a vehicle

• direct

• inverse

• none

• both

Is the following statement is inverse proportion or direct proportion?

area of the cultivated land and the crop harvested

• direct

• inverse

• none

• both