9514 404 393
Answer:
128/7 ≈ 18.29
Step-by-step explanation:
The average rate of change is the slope of the line between the two points. That is given by the formula ...
m = (y2 -y1)/(x2 -x1)
m = (251 -123)/(14 -7) = 128/7 = 18 2/7 ≈ 18.29
The average rate of change is 128/7 ≈ 18.29.