is linear (a straight line)

becomes steeper as the quantity of the input increases.

could be any of these answers.

becomes flatter as the quantity of the input increases.

0

10

17

23

constant marginal product of labour.

diminishing marginal product of labour

increasing returns to scale.

increasing marginal product of labour

rent on the factory

wages paid to factory labour

interest payments on borrowed financial capital

payment on the lease for factory equipment

Rs. 2.50

Rs. 5

Rs. 9

Rs. 26