# Desktop Python teaching example. Numerical inputs are illustrative.
pairs = [(900, 0.100), (1800, 0.201), (2700, 0.298)]  # fictional
scale = sum(n * d for n, d in pairs) / sum(n * n for n, d in pairs)
for n, d in pairs:
    print(n, "predicted_m", scale * n, "residual_m", d - scale * n)