L i n lo, I n v quad ab–ex, A regression calculation types – Casio fx-50F PLUS User Manual
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Performing Paired-variable Statistical Calculations
To perform the example operations in this section, fi rst select REG (
N5) as the
calculation mode.
A Regression Calculation Types
The REG Mode lets you perform the seven types of regression listed below. The fi gures in
the parentheses show the theoretical formulas.
• Linear
(
y
=
a
+
bx
)
• Quadratic
(
y
=
a
+
bx
+
cx
2
)
• Logarithmic
(
y
=
a
+
b
ln
x
)
•
e
Exponential
(
y
=
ae
bx
)
•
ab
Exponential
(
y
=
ab
x
)
• Power
(
y
=
ax
b
)
• Inverse
(
y
=
a
+
b
/
x
)
Each time you enter the REG Mode, you must select the type of regression calculation you
plan to perform.
Selecting the Regression Calculation Type
1. Press
N5(REG) to enter the REG Mode.
• This displays the initial regression calculation selection menu. The menu has two
screens, and you can use
d and e to navigate between them.
L i n Lo
g
E x
p
Pwr
1 2 3 4
I n v Quad AB–Ex
p
1 2
3
2. Perform one of the following operations to select the regression calculation you want.
To select this regression type:
And press this key:
Linear
1(Lin)
Logarithmic
2(Log)
e
Exponential
3(Exp)
Power
4(Pwr)
Inverse
e1(Inv)
Quadratic
e2(Quad)
ab
Exponential
e3(AB-Exp)
Note
You can switch to another regression calculation type from within the REG Mode, if you
want. Pressing
12(S-VAR) 3(TYPE) will display a menu screen like the one shown in
step 1 above. Perform the same operation as the above procedure to select the regression
calculation type you want.