Mathematics, 08.02.2021 18:40 TropicalFan

Martina turns on a treadmill to start walking. She takes 1 minute to gradually increase her speed and then walks at the same speed for 4 minutes. She increases her speed twice more during the 15 minutes
she is on the treadmill, as shown on the graph below. Which best describes the function of Martina's
walking speed over the interval (0.15]?

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Martina turns on a treadmill to start walking. She takes 1 minute to gradually increase her speed an...