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Gekata [30.6K]
3 years ago
6

9)

Biology
1 answer:
katen-ka-za [31]3 years ago
5 0

Answer:

B

Explanation:

At 12 Tommy was walking at 4 mph, then at 12:30 he was walking at 6 mph. He went from 4 to 6 which on a graph would go up, therefore a positive acceleration

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