Answer:
The average speed of the train during the interval of 30 to 40 minutes is 1 mile per minute.
Explanation:
To determine the average speed of the train during the interval of 30 to 40 minutes, we need to find the change in distance and divide it by the change in time.
From the graph, we can see that at 30 minutes, the distance from the station is 40 miles, and at 40 minutes, the distance is 50 miles.
Change in distance = 50 miles - 40 miles = 10 miles
Change in time = 40 minutes - 30 minutes = 10 minutes
To find the average speed, we divide the change in distance by the change in time:
Average speed = Change in distance / Change in time
Average speed = 10 miles / 10 minutes
Average speed = 1 mile per minute
Therefore, the average speed of the train during the interval of 30 to 40 minutes is 1 mile per minute.