Final answer:
The average change per day in stock value is $49.
Step-by-step explanation:
To find the average change per day, we need to divide the total change in stock value by the number of days. In this case, the total change in stock value is $248 and the number of days in the 5-day work week is 5. Therefore, the average change per day is $248 / 5 = $49. So, the average change per day is $49.