data := [[8, 18.09085257], [-.311354118, 15.96418339], [-8.369530610, 17.95692\
794], [-8.330047912, 18.71751990], [7.648058748, 14.66684819], [-2.961503117,
15.88625257], [-9.861953960, 17.23630741], [-3.364590396, 17.18553564], [.5466\
900114, 16.26272959], [-10.15624356, 16.90883984], [-2.639413454, 15.44690455]
, [-9.685638558, 18.21685655], [-8.825619258, 18.15261557], [-7.452189233, 17.\
76741917], [8.965461336, 13.70886636], [9.526674446, 14.21703610], [-1.8778081\
19, 15.90087154], [-3.765440646, 16.76041528], [1.153636385, 15.91863630], [-.\
570365038e-1, 15.04074170], [5.068882975, 14.60558922], [-2.435235695, 16.0283\
7311], [5.646496639, 13.88390275], [-4.640878964, 17.50802323], [-7.672425884,
16.82315466], [-2.178826834, 15.34856564]];