HP 12C#ABA hp 12c_solutions handbook_English_E.pdf - Page 160
Statistics, List price., Discount%.
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Calculations of List and Net Prices with Discounts • L = List price. • N = Net price. • D = Discount(%). • D' = 1 - ---D-----100 • L = -D----'-1----×-----D----'--2---N-×-----S.--.--S.----D----'-D-x----F-- • Dx = 1 - -L---(---D----1----×----D-----2---×--N---D-.--.-.D------×----D-----X--------1---) Statistics Exponential Curve Fit • y = AeBx • B = -Σ---x----i--l-n----y---i---------1n x---i l--n---y----i-)- Σxi2 - 1-n ( Σxi )2 • A = exp -Σ----l-n----y---i - BΣ----x---i n n • = -AeBx Logarithmic Curve Fit • y = A + B(ln x) 159
159
Calculations of List and Net Prices with Discounts
•
L
= List price.
•
N
= Net price.
•
D
= Discount(%).
•
•
•
Statistics
Exponential Curve Fit
•
y
=
Ae
Bx
•
•
•
= -
Ae
Bx
Logarithmic Curve Fit
•
y
=
A
+
B
(ln
x
)
D
'
1
D
100
---------
–
=
L
N
D
'
1
D
'
2
SSDDF
×
×
--------------------------------------------------
=
...
D’
x
D
x
1
N
LD
1
D
2
×
×
D
X
1
–
×
(
)
-------------------------------------------------------------
–
=
...
B
Σ
x
i
y
i
1
n
--
Σ
x
i
(
)
Σ
lny
i
(
)
–
ln
Σ
x
i
2
1
n
--
Σ
x
i
(
)
2
–
------------------------------------------------------------
=
A
Σ
y
i
ln
n
-------------
B
Σ
x
i
n
-------
–
exp
=