Final answer:
James's average speed during his trip was 90 kilometers per hour (km/h), calculated by dividing the total distance of 450 km by the total time of 5 hours.
Step-by-step explanation:
The question asks us to calculate the average rate of change in the distance covered when James drove a car for 450 kilometers in 5 hours. The average rate of change in this context is also known as the average speed.
To find the average speed, you divide the total distance traveled by the total time taken. Therefore, using the formula:
Average Speed = Total Distance / Total Time
For James, the calculation would be:
Average Speed = 450 km / 5 h = 90 km/h
Thus, James's average speed during his trip was 90 kilometers per hour (km/h).