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urgent A level biology

The equation shows the relationship between urine concentration in arbitrary
units (𝑦) and mean length of the loop of Henle in mm (𝑥).
𝑦 = 0.72𝑥 + 4
Calculate the mean length of the loop of Henle in an organism that produces urine with a concentration of 16.56 arbitrary units.
Original post by saraseax
The equation shows the relationship between urine concentration in arbitrary
units (𝑦) and mean length of the loop of Henle in mm (𝑥).
𝑦 = 0.72𝑥 + 4
Calculate the mean length of the loop of Henle in an organism that produces urine with a concentration of 16.56 arbitrary units.



16.56 = 0.72x + 4

rearrange to find x.

that's how I would approach it, is there any additional information?

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