This is what I got putting this into to Desmos. Hope it helps :)
I would say the correct answer is D.
It corresponds with the statement made in the question, saying that 95%(the majority) of customers who rated the store as having high quality service returned.
The answer is 231 miles because 1906-1503 is 403 Then 403+2196-1906 is equal to 693 and then you were divided by 3 to find the mean
76 -20 = 56 so then you do 56/8 which is 7
So 7 is the answer Hope this helps