K power regression graph, K sinusoidal regression graph – Casio FX-CG10 User Manual
Page 212
6-19
k Power Regression Graph
Power regression expresses
y
as a proportion of the power of
x
. The standard power
regression formula is
y
=
a
×
x
b
, so if we take the logarithm of both sides we get In
y
= In
a
+
b
× In
x
. Next, if we say X = In
x
, Y = In
y
, and A = In
a
, the formula corresponds to
linear regression formula Y = A +
b
X.
1(CALC) 6( g) 4(Power)
6(DRAW)
The following is the power regression model formula.
y
=
a
·
x
b
a
.............. regression coefficient
b
.............. regression power
k Sinusoidal Regression Graph
Sinusoidal regression is best applied for cyclical data.
The following is the sinusoidal regression model formula.
y
=
a
·sin(
bx
+
c
) +
d
1(CALC) 6( g) 5(Sin)
6(DRAW)
Drawing a sine regression graph causes the angle unit setting of the calculator to automatically
change to Rad (radians). The angle unit does not change when you perform a sine regression
calculation without drawing a graph.
• Certain types of data may take a long time to calculate. This does not indicate malfunction.