Casio ALGEBRA FX 2.0 Statistical Graphs and Calculations Instrukcja Użytkownika Pobierz pdf (Strona 17)

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k Logarithmic Regression Graph

Logarithmic regression expresses y as a logarithmic function of x. The standard logarithmic

regression formula is y = a + b × In x, so if we say that X = In x, the formula corresponds to

linear regression formula y = a + bX.

4(CALC)h(Log)

6(DRAW)

The following is the logarithmic regression model formula.

y = a + b

•

ln x

a .............

regression constant term

b ............. regression coefficient

r .............. correlation coefficient

............ coefficient of determination

k Exponential Regression Graph

Exponential regression expresses y as a proportion of the exponential function of x. The

standard exponential regression formula is y = a × e

, so if we take the logarithms of both

sides we get In y = In a + bx. Next, if we say Y = In y, and a = In a, the formula corresponds

to linear regression formula Y = a + bx.

4(CALC)i(Exp)

6(DRAW)

The following is the exponential regression model formula.

y = a

•

a ............. regression coefficient

b ............. regression constant term

r .............. correlation coefficient

............ coefficient of determination

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Calculating and Graphing Paired-Variable Statistical Data

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Casio ALGEBRA FX 2.0 Statistical Graphs and Calculations Instrukcja Użytkownika Strona 17