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A high-speed rail system in China carries passengers from Beijing to Shanghai. The train accelerates out of Beijing, travels at a constant 250 km/h, and

A high-speed rail system in China carries passengers from Beijing to Shanghai. The train accelerates out of Beijing, travels at a constant 250 km/h, and decelerates into Shanghai. The train stops and completes the same trip in reverse until it arrives back in Beijing. The total trip takes 8 hours.
Which of the graphs below correctly represent the trip?Justify answers.

4kg -1.5kg

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