The answer is B. -3 ________
Answer: B. 62.8 cubic units :)
Answer:

Step-by-step explanation:

<span>Go up to 4 on the y axis, and then go up 2 and over 1, then graph.
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You first need to know how much miles it takes on the trail. Then you look 20 x 3 is one hour. And if the 3 group said it takes 2 hours waking for them its like this, the first group takes one hour to go thru the trail, but the second group takes and hour and half the 3 group takes 2 hours.
I wish this helps. :)