Casio fx-9750G Statistical Graphs and Calculations - Manual (Page 18)

300
6 (DRAW)
The following are the meanings of the above parameters.
a ...... Regression coefficient
b ...... Regression constant term
r ...... Correlation coefficient
k k k k k Power Regression Graph
Exponential 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 logarithms of both sides we
get log y = log a + b
×
log x . Next, if we say X = log x , Y = log y , and a = log a , the
formula corresponds to linear regression formula Y = a + b X.
6 (
g
) 3 (Pwr)
6 (DRAW)
The following are the meanings of the above parameters.
a ...... Regression coefficient
b ...... Regression power
r ...... Correlation coefficient
1 2 3 4 5 6
18 - 4
Calculating and Graphing Paired-Variable Statistical Data
P.290