Laura Langer

Graph 12

At the beginning of the day, there was 40 bags of in the cafe. From hour 1 to hour 3, all 40 bags of chips had been bought.  At a constant rate, the janitor named Shruti filled the cafe with 30 bags of  chips, she finished at hour 5. For the rest of the day, nobody bought any chips. The cafe closed at hour 7.

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