Answer:
It descends 3 km.
Step-by-step explanation:
The rate of change is the slope. The formula for slope is

Using the first two points, (0, 12) and (2, 10), we have
m = (10-12)/(2-0) = -2/2 = -1
This means the plane descends 1 km per minute. This means in 3 minutes' time, the plane descends 3 km.
This is the same as averaging. You add them and divide by 2.
((m/n) + (p/q))/2 would be a number in between m/n and p/q.
Do note that n and q must be nonzero, but luckily that is a given.
Answer:
you can divide the answers by the time duration of the exam and get your answer
Step-by-step explanation: