Casio FX-9860GII-L-IH User Guide - Page 294
Logarithmic Regression Graph, Exponential Regression Graph
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6-3-8 Calculating and Graphing Paired-Variable Statistical Data 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. 1(CALC)6(g)2(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 r2 coefficient of determination MSe ........ mean square error 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 × ebx, 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. 1(CALC)6(g)3(Exp) 6(DRAW) The following is the exponential regression model formula. y = a • ebx a regression coefficient b regression constant term r correlation coefficient r2 coefficient of determination MSe ........ mean square error 20050401