Casio fx-7400G PLUS

117
Statistical Graphs and Calculations Chapter 7
4(DRAW)
The following are the meanings of the above parameters.
a ...... Regression coefficient
b ...... Regression constant term
r ...... Correlation coefficient
kk
kk
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 = loga + b × logx. Next, if we say X = log x, Y = logy, and A = loga, the
formula corresponds to linear regression formula Y = A +
bX.
[3(Pwr)
4(DRAW)
The following are the meanings of the above parameters.
a ...... Regression coefficient
b ...... Regression power
r ...... Correlation coefficient
P. 106
1234