Power Regression Graph; Sinusoidal Regression Graph - Casio FX-CG20 AU User Manual

k Power Regression Graph
Power regression expresses
regression formula is
y a b
ln = ln + × ln
linear regression formula Y = A +
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.
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.
y
as a proportion of the power of
b
y a x
= × , so if we take the logarithm of both sides we get
x
. Next, if we say X = ln
b
X.
1(CALC) 6( g) 4(Power)
6(DRAW)
y a bx c d
= ·sin( + ) +
1(CALC) 6( g) 5(Sin)
6(DRAW)
x
. The standard power
x y
, Y = ln , and A = ln
6-20
a
, the formula corresponds to