# Quadratic regression Calculator

## Analyzes the data table by quadratic regression and draws the chart. | |||

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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 |

- Purpose of use
- Personal curiousity
- Comment/Request
- Give the formula to calculate R^2 in terms of Sxx, etc.

[1] 2019/04/21 05:35 Male / 60 years old level or over / An engineer / Very /

- Purpose of use
- Math homework
- Comment/Request
- Great quadratic regression formula.

[2] 2019/04/12 01:05 Female / Under 20 years old / High-school/ University/ Grad student / Very /

- Purpose of use
- Math homework

[3] 2019/04/10 10:08 Female / Under 20 years old / High-school/ University/ Grad student / Useful /

- Purpose of use
- math homework
- Comment/Request
- it would be very useful if the equation was ax^2+bx+c instead of a+bx+cx^2.

[4] 2019/04/09 08:28 Male / Under 20 years old / High-school/ University/ Grad student / Useful /

- Purpose of use
- Algebra 1 homework
- Comment/Request
- Add ability to make predictions from model.

[5] 2019/03/21 10:49 Female / Under 20 years old / Elementary school/ Junior high-school student / Useful /

- Purpose of use
- Algebra 1 homework

[6] 2019/03/19 08:11 Female / Under 20 years old / High-school/ University/ Grad student / A little /

- Purpose of use
- Pre-Calculus homework
- Comment/Request
- A+Bx+Cx² is not standard in anything I've seen, ax²+bx+c seems to be much more common

[7] 2019/03/15 23:54 Male / Under 20 years old / High-school/ University/ Grad student / Useful /

- Purpose of use
- Homework
- Comment/Request
- Make the results copy-pastable.

[8] 2019/03/08 10:18 Male / Under 20 years old / Elementary school/ Junior high-school student / Useful /

- Purpose of use
- Algebra 2 homework
- Comment/Request
- Have the data table of the graph available. Also, the formula is not one proper order according to powers.

[9] 2019/02/13 10:12 Female / Under 20 years old / High-school/ University/ Grad student / A little /

- Purpose of use
- Best quadratic fit from noisy Doppler data.
- Comment/Request
- Superb.

[10] 2018/11/30 02:33 Male / 60 years old level or over / A teacher / A researcher / Very /

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