Final answer:
Using integers to represent the market price change, a drop of $5 per hour over 4 hours is denoted as four instances of -5. By multiplying -5 by 4, the total change in stock price is an integer of -20, reflecting a $20 total decrease.
Step-by-step explanation:
To represent the stock price change using integers, we denote the drop in price per hour as -5. Since the stock price dropped $5 per hour for 4 hours, we have four instances of -5. To find the total points the stock fell, we can sum these integers.
- Multiply the drop per hour (-5) by the number of hours (4).
- -5 × 4 = -20
Therefore, the total points the stock fell is represented by the integer -20.