Mathematics, 15.04.2020 23:17, iggysouchet

Anna does sit-ups to get ready for her first triathlon. When she starts, she does a sit-up every 2 seconds. But, as she gets tired, each sit-up takes longer and longer to do. Is the number of sit-ups Anna does proportional to the time she spends doing them?

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Anna does sit-ups to get ready for her first triathlon. When she starts, she does a sit-up every 2 s...