State whether the given statement is true or false:

The number of workers and the time to complete a job is a case of direct proportion.

State whether the given statement is true or false:

For fixed time period and rate of interest, the simple interest is directly proportional to the principal.

Which of the following vary directly and which vary inversely with each other and which are neither of the two?

The time taken by a train to cover a fixed distance and the speed of the train.

Which of the following vary directly and which vary inversely with each other and which are neither of the two?

The distance travelled by $\mathrm{CNG}$ bus and the amount of $\mathrm{CNG}$ used.

Which of the following vary directly and which vary inversely with each other and which are neither of the two?

The number of people working and the time to complete a given work

Which of the following vary directly and which vary inversely with each other and which are neither of the two?

Income tax and the income.

Which of the following vary directly and which vary inversely with each other and which are neither of the two?

Distance travelled by an auto-rickshaw and time taken.

Which of the following vary directly and which vary inversely with each other and which are neither of the two?

Number of students in a hostel and consumption of food.