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Rhart3's interactive graph and data of "Absorbance vs. pH- Determination of pKa" is a scatter chart, showing Col2 vs Col2 - fit; with pH in the x-axis and Absorbance in the y-axis.. The x-axis shows values from 4.646803778184034 to 11.363196221815965. The y-axis shows values from -0.009855204664079503 to 0.789446870214592. This visualization has the following annotations: R2 = 0.9797f(x) = .450*(1 / (1 + 10^(x - (7.92)))*(-1.47) + (10^x - (7.92)) / (1 + 10^x - (7.92))*(1.53)); R2 = 0.9797f(x) = .450*(1 / (1 + 10^(x - (7.92)))*(-1.47) + (10^x - (7.92)) / (1 + 10^x - (7.92))*c);