TUGAS MATEMATIKA REKAYASA KE 2
NAMA : CHOLIQ AUFAR NUGRAHA
NPM : 0953010017
x y x² x³ x⁴ xy x²y
1 127 1 1 1 127 127
3 257 9 27 81 771 2313
5 377 25 125 625 1885 9425
7 557 49 343 2401 3899 27293
9 767 81 729 6561 6903 62127
11 987 121 1331 14641 10857 119427
13 1267 169 2197 28561 16471 214123
15 1847 225 3375 50625 27705 415575
64 6186 680 8128 103496 68618 850410
a ) Jadi Model matematikanya adalah y = 113.869 x - 137.702
b ) Jadi Model matematikanya adalah y = 4.765 x² + 43.951 x
c ) Jadi Model matematikanya adalah y = 6.89 x² + 3.631 x + 158.562
a b c
ŷ y - ŷ ( y - ŷ )² ŷ y - ŷ ( y - ŷ )² ŷ y - ŷ ( y - ŷ )²
-23.833 150.833 22750.5939 48.716 78.284 6128.38466 169.083 -42.083 1770.97889
203.905 53.095 2819.07903 174.738 82.262 6767.03664 231.465 25.535 652.036225
431.643 -54.643 2985.85745 338.88 38.12 1453.1344 348.967 28.033 785.849089
659.381 -102.381 10481.8692 541.142 15.858 251.476164 521.589 35.411 1253.93892
887.119 -120.119 14428.5742 781.524 -14.524 210.946576 749.331 17.669 312.193561
1114.857 -127.857 16347.4124 1060.026 -73.026 5332.79668 1032.193 -45.193 2042.40725
1342.595 -75.595 5714.60403 1376.648 -109.648 12022.6839 1370.175-103.175 10645.0806
1570.333 276.667 76544.6289 1731.39 115.61 13365.6721 1763.277 83.723 7009.54073
6186 0 152072.619 6053.064 132.936 45532.1311 6186.08 -0.08 24472.0253
ŷ y - ŷ ( y - ŷ )² ŷ y - ŷ ( y - ŷ )² ŷ y - ŷ ( y - ŷ )²
-23.833 150.833 22750.5939 48.716 78.284 6128.38466 169.083 -42.083 1770.97889
203.905 53.095 2819.07903 174.738 82.262 6767.03664 231.465 25.535 652.036225
431.643 -54.643 2985.85745 338.88 38.12 1453.1344 348.967 28.033 785.849089
659.381 -102.381 10481.8692 541.142 15.858 251.476164 521.589 35.411 1253.93892
887.119 -120.119 14428.5742 781.524 -14.524 210.946576 749.331 17.669 312.193561
1114.857 -127.857 16347.4124 1060.026 -73.026 5332.79668 1032.193 -45.193 2042.40725
1342.595 -75.595 5714.60403 1376.648 -109.648 12022.6839 1370.175-103.175 10645.0806
1570.333 276.667 76544.6289 1731.39 115.61 13365.6721 1763.277 83.723 7009.54073
6186 0 152072.619 6053.064 132.936 45532.1311 6186.08 -0.08 24472.0253
a ) SD =
= 10862.329932
b ) SD =
= 3252.29508
c ) SD =
= 1748.00180628571
Jadi persamaan yang paling tepat adalah y = 6.89 x² + 3.631 x + 158.562
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