Answer: The word "function" is used to describe that the number of days is dependent on the number of workers.
Number of days = f(number of workers).
Step-by-step explanation:
We know that the more the number of workers will be involved in the harvesting of onion, the lesser days it will take to complete.
Thus, the number of workers becomes the independent variable, which is the input, and the number of days becomes the dependent variable, which is the output.