SOLUTION: https://ibb.co/d40WLHJ Find the best fitting Quadratic model for the data a) -26x^2+22,59×+23.02 b) -26x^2 17.3x+222.8 c) 2.6x^2+22.9x+20.03 d) 2.6x^2+2.3x+23.02

Question 1206259: https://ibb.co/d40WLHJ
Find the best fitting Quadratic model for the data
a) -26x^2+22,59×+23.02
b) -26x^2 17.3x+222.8
c) 2.6x^2+22.9x+20.03
d) 2.6x^2+2.3x+23.02
Found 2 solutions by math_tutor2020, ikleyn:
Answer by math_tutor2020(3835) (Show Source): You can put this solution on YOUR website!

Answer:

Explanation

I used GeoGebra to find the answer. I entered the data into the spreadsheet portion, then created a list of points based off it. Lastly I applied the fitPoly function to that list to determine the regression model.
https://wiki.geogebra.org/en/FitPoly_Command

It is possible to find the quadratic regression equation by hand, but it would be very tedious and take a while. It's recommended to use a specialized calculator instead.

Here is an article talking about it with the TI84 or similar style of calculators.
https://education.ti.com/en/customer-support/knowledge-base/ti-83-84-plus-family/product-usage/11931

Or here's an alternative calculator
https://www.statology.org/quadratic-regression-calculator/

Another alternative (of many others) is to use a spreadsheet.
Feel free to explore your favorite calculator.

Answer by ikleyn(53763) (Show Source): You can put this solution on YOUR website!
.
https://ibb.co/d40WLHJ
Find the best fitting Quadratic model for the data
a) -26x^2+22,59×+23.02
b) -26x^2 17.3x+222.8
c) 2.6x^2+22.9x+20.03
d) 2.6x^2+2.3x+23.02
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hello, your post is defective.

It is defective, since in (b) the given function is unreadable: the sign at the x-term is missed.

(b) is one of two candidates, but it is impossible to work with it.

Fix this deficiency and re-post to the forum.

Please do not post your update to me in person.

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