# e-Exponential regression Calculator

## Analyzes the data table by e-exponential regression and draws the chart.

 e-Exponential regression: y=AeBx

 （input by clicking each cell in the table below） data 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit
 Guidelines for interpreting correlation coefficient r :　　0.7＜|r|≦1        strong correlation　　0.4＜|r|＜0.7     moderate correlation　　0.2＜|r|＜0.4     weak correlation　　0≦|r|＜0.2         no correlation$\normal\ e{\tiny -}Exponential\ regression\vspace{10}\\(1)\ mean:\ \bar{x}={\large \frac{{\small \sum}{x_i}}{n}},\hspace{10}\bar{lny}={\large \frac{{\small \sum}{lny_i}}{n}}\\[10](2)\ trend\ line:\ y=Ae^{Bx},\hspace{10} B={\large\frac{Sxy}{Sxx}},\hspace{10} A=exp{\bar{lny}-B\bar{x}}\\[10]\\(3)\ correlation\ coefficient:\ r=\frac{\normal S_{xy}}{\normal sqrt{S_{xx}}sqrt{S_{yy}}}\\\hspace{20}S_{xx}={\large \frac{{\small \sum}(x_i-\bar{x})^2}{n}}={\large \frac{{\small \sum} x_i^2}{n}}-\bar{x}^2\\\hspace{20}S_{yy}={\large \frac{{\small \sum}(lny_i-\bar{lny})^2}{n}}={\large \frac{{\small \sum} lny_i^2}{n}}-\bar{lny}^2\\\hspace{20}S_{xy}={\large \frac{{\small \sum}(x_i-\bar{x})(lny_i-\bar{lny})}{n}}={\large \frac{{\small \sum} x_i lny_i}{n}}-\bar{x}\bar{lny}\\$

e-Exponential regression
 [1-2] /2 Disp-Num5103050100200
[1]  2017/02/27 20:07   Female / Under 20 years old / High-school/ University/ Grad student / A little /
Purpose of use
Help on a math assignment.
Comment/Request
Needed simple working out, other then that was great.
[2]  2016/02/10 16:38   Male / 30 years old level / A teacher / A researcher / Useful /
Comment/Request
e-Exponential regression: y=AeBx

What if the value of (A) was forced e.g. A=5 without using the above equation of A, how can we get the value of (B)? Thanks!

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