Calculate the rate of change for the interval 45

Find the difference between 45 and 55:
55-45 = 10
Find the difference between the mpg for 45 and 55:
35 - 34.1 = 0.9
Divide the difference in mpg by the difference in x:
0.9 / 10 = 0.09
The answer is B.
Answer:
Option B: 0.09 mpg/mph
Step-by-step explanation:
You divide the delta (=difference) in F by the delta in x:
delta F is 35.0-34.1 = 0.9
delta x = 55-45 = 10
so rate of change is 0.9/10 = 0.09, answer B