If you multiply 10 by 4 that gets you the area, but you need to find the surface so multiply the product by 7 and that gets you the surface which is 280
I highly believe that the answer is 35
Since, we don't have the actual graph, I cannot give you a final answer. However, I can explain how to find the answer.
If you are looking for the color that the fans like the least, just pick the bar that is the smallest. This will be the correct answer.
Split it into 7 triangles. Half-base of each is 2 so the distance of center to the midpoint of the base is (Pythagoras) square root of (4.62 - 22) = 4.162 triangle is this times 2, and with 7 triangles multiply also by 7 to get an approximate area of 58 sq in.
Y 4 times 5 = square 5 divided by 6 = x times B so the anwser is sq 9
