# Linear regression Calculator

## Analyzes the data table by linear regression and draws the chart.

 Linear regression: y=A+Bx
 （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$\normal\ Linear\ regression\vspace{10}\\(1)\ mean:\ \bar{x}={\large \frac{{\small \sum}{x_i}}{n}},\hspace{10}\bar{y}={\large \frac{{\small \sum}{y_i}}{n}}\\[10](2)\ trend\ line:\ y=A+Bx,\hspace{10} B={\large\frac{Sxy}{Sxx}},\hspace{10} A=\bar{y}-B\bar{x}\\[10](3)\ correlation\ coefficient:\ r=\frac{\normal S_{xy}}{\normal sqrt{S_{xx}}sqrt{S_{yy}}}\\\hspace{20}S_{xx}={\large \frac{{\small \sum}(x_i-\bar{x})^2}{n}}={\large \frac{{\small \sum} x_i^2}{n}}-\bar{x}^2\\\hspace{20}S_{yy}={\large \frac{{\small \sum}(y_i-\bar{y})^2}{n}}={\large \frac{{\small \sum} y_i^2}{n}}-\bar{y}^2\\\hspace{20}S_{xy}={\large \frac{{\small \sum}(x_i-\bar{x})(y_i-\bar{y})}{n}}={\large \frac{{\small \sum} x_i y_i}{n}}-\bar{x}\bar{y}\\$
Linear regression
 [1-10] /22 Disp-Num5103050100200
[1]  2018/09/10 22:40   Male / Under 20 years old / Self-employed people / Very /
Purpose of use
A meme dealer
Comment/Request
This is it Chief.
[2]  2018/08/27 12:11   Male / 50 years old level / An engineer / Very /
Purpose of use
I was given 3 temperature measurements by a customer where X was known, and Y was given by the customer. Graphed, these measurements appeared to be linear, so this calculator allowed me to quickly compute slope/intercept values to compute the entire (useful) temperature scale from this customer''s 3 measurements.
[3]  2018/06/08 13:37   Male / 20 years old level / High-school/ University/ Grad student / Useful /
Purpose of use
internship project
Comment/Request
was not able to copy and paste data from excel sheet
[4]  2018/05/17 23:57   Female / Under 20 years old / Elementary school/ Junior high-school student / Very /
Purpose of use
a teacher suggested that her student use the website.
[5]  2018/05/15 22:19   Female / Under 20 years old / Elementary school/ Junior high-school student / Useful /
Purpose of use
I don''t have a real calculator
Comment/Request
Font size bigger
[6]  2018/05/15 22:17   Female / Under 20 years old / Elementary school/ Junior high-school student / Useful /
Purpose of use
I don''t have to do real work
Comment/Request
Thank u for doing all the work for me
[7]  2018/03/22 22:37   Male / Under 20 years old / High-school/ University/ Grad student / A little /
Purpose of use
Do not have a correct graphing calc.
Comment/Request
I would suggest making an equation for the linear regression; the single numbers are not very useful by themselves. Also, an r^2 value would be good as well.
[8]  2018/03/20 09:01   Male / - / High-school/ University/ Grad student / Useful /
Purpose of use
No calculator so had to use this and it isn''t the same as before with the calculator
[9]  2018/03/19 23:46   Female / Under 20 years old / High-school/ University/ Grad student / Not at All /
Purpose of use
I cant figure out what this is supposed to do it say I''m not logged in when I have an account on here.
[10]  2018/02/18 23:51   Female / 20 years old level / High-school/ University/ Grad student / Very /
Purpose of use
To know better
Comment/Request
It is verry good

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