Difficult Question:

Don't be too specific a range is often most comfortable for everyone to work with. Even better, ask if the company has a salary scale and base your answer on that. Remember, salary is related to market value. Research your worth before you get into the interview. Also, interviews are not ignorant. Research your market value and give a range:
I checked a few sites on the internet and found that the average salary for a web designer ranges from 45K to 60K per year in this geographic area, depending on the responsibilities and duties involved. I am not set on a specific number and am willing to negotiate.