Casio fx-9750G PLUS - Manual (Page 292)

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Calculating and Graphing Paired-Variable Statistical Data
k k k k k
Power Regression Graph
P.254 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 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.
6 (g)3(Pwr)
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6 (DRAW)
a ...... regression coefficient
b ...... regression power
r ...... correlation coefficient
r 2 ..... coefficient of determination
k k k k k
Sine Regression Graph
Sine regression is best applied for phenomena that repeats within a specific
range, such as tidal movements.
y = a ·sin( bx + c ) + d
While the statistical data list is on the display, perform the following key operation.
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.
P.254
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