Final answer:
The stock market lost the most value on Wednesday, with a negative change of -21.69.
Step-by-step explanation:
The student asked which day the stock market lost the most value during a particular week. To answer this, we look at the changes in stock market value for each day provided:
- Monday: -13.61
- Tuesday: +17.39
- Wednesday: -21.69
- Thursday: -6.16
We can identify the day with the greatest loss by finding the day with the most negative change. In this case, Wednesday had the largest negative value change of -21.69, indicating that the stock market lost the most value on Wednesday relative to the other days listed.