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You needed to graph the percent water loss each day instead of the total amount of water lost each day because the original plants could have been of different mass in the beginning. You can't compare the amount of water because the plants are not identical, so these numbers aren't proportional by default.

example:

Plant A is 24 g.

Plant B is 36 g.

Both plants lose 10 g of water.

Plant A becomes 14 g.

Plant B becomes 26 g.

Therefore,

Plant A lost 10/24, while Plant B lost 10/36. They didn't actually lose the same amount proportionally, so you have to change them so that you can compare the data accurately.

Hope that made sense!

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13y ago

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