Answer:
3
Step-by-step explanation:
I think you misses attaching the photo, so please have a look at my photo for your better understanding.
We know the formula for rate of change of the parabola line:
Given here:
a= 2 => f(a) = 2
b=6 => f(b) = 2
Substitute all the values into the function, we have:

So the rate of change is 3
Answer:
the answer is B hope this helps you
the answer is the number of pages divided by the number of minutes.
7.5/9=0.833333, so she reads on average 0.83 pages per minute