Final answer:
Katie swam at a constant rate of 100 meters per minute to complete the 800-meter freestyle in 8 minutes.
Step-by-step explanation:
The student asked how many meters per minute Katie swam if she completed the 800-meter freestyle in 8 minutes at a constant rate. To find the rate of swimming, we divide the total distance she swam by the total time it took. Therefore, her pace was 800 meters divided by 8 minutes, which equals 100 meters per minute.