TUGAS MATEMATIKA REKAYASA II (LEAST SQUARE)
NAMA : IMAM TOHARI
NPM : 0953010017
DATA :
x | y | x . y | x² |
1 | 1.7 | 1.7 | 1 |
2 | 3.7 | 7.4 | 4 |
3 | 5.7 | 17.1 | 9 |
4 | 8.7 | 34.8 | 16 |
5 | 12.7 | 63.5 | 25 |
Σx = 15 | Σy = 32.5 | Σxy = 124.5 | Σx² = 55 |
Ditanya : Model matematika y = ax+b ???
Σxy = Σx².a + Σx.b
Σy = Σx.a + n.b
JAWAB : 124.5 = 55a + 15b x1 32.5 = 15(2.7) + 5b
32.5 = 15a + 5b x3 32.5 – 40.5 = 5b
124.5 = 55a -8 = 5b
97.5 = 45a -1.6 = b
27 = 10a
2.7 = a
· Jadi model matematika y = 2.7x – 1.6
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