Final answer:
To ensure that the functions work correctly, the data analyst needs to follow the functions. This means using the correct input and input format as specified by the function and following any steps or instructions provided by the function.
Step-by-step explanation:
To ensure that the functions work correctly, the data analyst needs to follow the functions. Following the functions means using the correct input and input format as specified by the function, and following any steps or instructions provided by the function. This ensures that the function will produce the desired output and perform the intended calculations or operations.