tugas matematika rekayas II yang ke 1

TUGAS MATEMATIKA REKAYASA II (LEAST  SQUARE) NAMA : RENDI PRATAMA NPM    : 0953010027 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