Answer:
The independent variable is the number of hours the worker works (x).
Step-by-step explanation:
We have to identify the independent variable in the following statement:
'The amount of money earned by a worker and the number of hours he works'.
Here, the amount of money he earns is dependent on the number of hours he works.
That means the amount of money is a function of the number of hours he works.
Therefore, the independent variable is the number of hours the worker works (x) and the dependent variable is the amount of money he earns (y).
Hence, we can write y = f(x) (Answer)
