TUGAS MATREK 2

TUGAS MATEMATIKA REKAYASA II TUGAS KE - 1 NAMA : MOHAMMAD FATIH AHDA NPM    : 0953010030 LEAST SQUARE x y x . y x² 1 1.0 1 1 2 3.0 6 4 3 5.0 15 9 4 8.0 32 16 5 12.0 60 25 Σx = 15 Σy = 24 Σx.y = 114 Σx² = 55 Diketahui : Model matematika y = ax+b ??? Σxy = Σx².a + Σx.b Σy = Σx.a + n.b JAWAB : 114 = 55a + 15b x1 114 = 55a                    24 = 15a + 5b x3 24    = 45a                                                   42 = 10a                                                  4.2 = a                                               24 = 15 (4.2) + 5b                              24 – 63 = 5b                                    -39 = 5b                         -7.8 = b                        Jadi  y = 4.2x – 7.8