–18–
#051
A = – B
(
)
– C
(
)
n
Σy
n
Σx
n
Σx
2
B =
S
xx
.
S
x
2
x
2
– (S
xx
2
)
2
S
xy
.
S
x
2
x
2
– S
x
2
y
.
S
xx
2
C =
S
xx
.
S
x
2
x
2
– (S
xx
2
)
2
S
x
2
y
.
S
xx
– S
xy
.
S
xx
2
(Σx)
2
Sxx
=
Σx
2
–
n
Sxy
=
Σxy
–
n
(
Σx
.
Σy
)
Sxx
2
=
Σx
3
–
n
(Σx
.
Σx
2
)
Sx
2
x
2
=
Σx
4
–
n
(
Σx
2
)
2
Sx
2
y
=
Σx
2
y
–
n
(
Σx
2
.
Σy
)
m
1
=
2C
– B
+
B
2
–
4
C
(
A
– y
)
m
2
=
2C
– B –
B
2
– 4C
(
A
– y
)
n = A + Bx + Cx
2
