Final answer:
Kiran's earnings are indeed a function of his hours worked; this is true. However, the hours he works are decided by the job, not by his earnings, making the second statement false. Lastly, the number of other people working does not directly affect Kiran's individual earnings, which also makes the third statement false.
Step-by-step explanation:
A) Kiran's earnings are a function of his hours worked. True. This statement indicates a direct relationship where the total earnings increase with the number of hours worked, given a fixed hourly wage.
B) Kiran's hours worked are a function of his earnings. False. Here, the causality is reversed and it's incorrect because hours worked are typically determined by the job requirements or choices made by the worker, not directly by how much earnings one has.
C) Kiran's earnings are a function of the number of people working. False. Kiran's earnings depend on his own hours worked and wage rate, not on the number of other people working.