You are conducting a drug trial for a new medication, NT71B, which has a side-effect of
decreasing iron levels. To guard against anemia, you regularly measure each patient's
hemoglobin levels to check for anemia. A healthy patient had a hemoglobin count of 14.2g/dL
at the start of the trial. By the end of the five-week trial, that patient's hemoglobin count had
dropped to 12.6g/dL. If the drug's effect was linear, by how much did it decrease the patient's
hemoglobin count each week?