METODE LEAST SQUARE (1)

  METODE LEAST SQUARE TAHUN ( n ) PENJUALAN ( y )

  49

  9

  2003

  37500 5 187500

  25

  2004

  39000 7 273000

  2005

  2002

  41200 9 370800

  81 305200 Σ=0 427800 330

  Yt = a + bx ----> a : konstanta bx : Variabel x a = Σy = 305.200 = 30.500 n 10 b = Σxy = 427.800 =1296,36 Σx² 330

  Jadi,,

  Y

  06 = a + bx

  = 30.520 + 1296,36 ( 11 ) = 44.779,96

  35000 3 105000

  1

  X XY X²

  24000 -5 -120000

  1996

  17500 -9 -157500

  81

  1997

  21500 -7 -150500

  49

  1998

  25

  32000 1 32000

  1999

  27500 -3 -82500

  9

  2000

  30000 -1 -30000

  1

  2001

LEAST SQUARE

SEMI AVERAGE TAHUN PENJUALAN

  1 )

  X SEMI TOTAL SEMI AVERAGE

  1996 17500 1997 21500 1 1998 24000

  2

• >

  120500 120500 = 24100 (Y

• >

  x1

  = a + bx = 18964 + 2568 ( 10 )

  06

  24.100 = a + 2b 36.940 = a + 7b b = 2568 a = 18964 Y

  x2 JADI,,

  = a + b

  2

  Y

  1

  = a + b

   5

  9 Y

  7 2004 39000 8 2005 41200

   5

  184700 184700 = 36940 ( Y 2 )

  6

  3 2000 30000 4 2001 32000 5 2002 35000

  1999 27500

  2003 37500