Alamat : Jl.Raya Maron Kulon Kec.Maron Kab.Probolinggo
|
Bulan
|
DOMPET (Y)
|
X
|
XY
|
X2
|
X2Y
|
X4
|
|
Januari
|
200
|
-9
|
-1800
|
81
|
16200
|
6561
|
|
Februari
|
350
|
-7
|
-2450
|
49
|
17150
|
2401
|
|
Maret
|
500
|
-5
|
-2500
|
25
|
12500
|
625
|
|
April
|
500
|
-3
|
-1500
|
9
|
4500
|
81
|
|
Mei
|
200
|
-1
|
-200
|
1
|
200
|
1
|
|
Juni
|
150
|
1
|
150
|
1
|
150
|
1
|
|
Juli
|
600
|
3
|
1800
|
9
|
5400
|
81
|
|
Agustus
|
200
|
5
|
1000
|
25
|
5000
|
625
|
|
September
|
250
|
7
|
1750
|
49
|
12250
|
2401
|
|
Oktober
|
100
|
9
|
900
|
81
|
8100
|
6561
|
|
TOTAL
|
3050
|
0
|
-2850
|
330
|
81650
|
19338
|
Mencari Nilai c
Y = n.a+c.∑x2
∑x2.y =∑x2.a + c.∑x
3050 = 10.a + c.330 (x33)
81650 = 330.a + c.19338 (x1) -
100650 = 330.a+c.10890
81650 = 330.a+c.19338-
19000 = c.(-8448)
19000 = c
(-8448)
2,249 = c
Mencari Nilai a
Y = n.a+c.∑x2
∑x2.y =∑x2.a + c.∑x4
3050 = 10.a + c.330 (x58,6)
81650 = 330.a + c.19338 (x1) -
178730 = 586.a+c.19338
81650 = 330.a+c.19338-
97080 = 256.a
97080 = a
256
379 = a
Mencari Nilai b
b = ∑xy
∑x2
= -2850 = -8,36
330
Bulan November
Y = a+b.x+c(x2)
= 379+(-8,36).11+(2,249).(112)
= 379+(-91,96)+(2,249).(121)
= 379+(-78,32)+(272,129)
= 572 Dompet
Bulan Desember
Y = a+b.x+c(x2)
= 379+(-8,36).13+(2,249).(132)
= 379+(-108,68)+(2,249).(169)
= 379+(-108,68)+(380,081)
= 650 Dompet
Bulan Januari
Y = a+b.x+c(x2)
= 379+(-8,36).15+(2,249).(152)
= 379+(-125,4)+(2,249).(225)
= 379+(-125,4)+(506,025)
= 759 Dompet
Bulan Februari
Y = a+b.x+c(x2)
= 379+(-8,36).17+(2,249).(172)
= 379+(-142,12)+(2,249).(289)
= 379+(-142,12)+(649,961)
= 886 Dompet
Bulan Maret
Y = a+b.x+c(x2)
= 379+(-8,36).19+(2,249).(192)
= 379+(-158,84)+(2,249).(361)
= 379+(-158,84)+(811,889)
= 1032 Dompet
Bulan April
Y = a+b.x+c(x2)
= 379+(-8,36).21+(2,249).(212)
= 379+(-175,56)+(2,249).(441)
= 379+(-175,56)+(991,809)
= 1195 Dompet
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