My friend needs good answers...
-Thank You
100 points
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1 - The distance per hour is:
50/10 = 5
5 × 7 = 35 (D)
2 - After analyzing the graph, I conclude that the answer is D because everything matches.
3 - I have observed that the bottom never is always 6 times higher. Given that:
9 × 6 = 54 (C)