100 : 8 = 12.5
12.5 Km per liter is your answer
The answer is B.
A and C would not be correct because you are finding the distance for 9 minutes. D is not correct because the y-axis does not even have 3 meters on it, neither does the graph hit y=3.
The expression for the length would be L = w + 7
6 + 2y = x
x + y = 180°
6 + 2y + y = 180°
3y = 174
y = 58°
x = 180° - 58°
x = 122°
i am a mathematics teacher. if anything to ask please pm me