Quadratic Regression

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  • เผยแพร่เมื่อ 30 ต.ค. 2024

ความคิดเห็น • 44

  • @gwen-pc2mo
    @gwen-pc2mo 2 ปีที่แล้ว +17

    math makes me wish i was never born

  • @fostermartinez7733
    @fostermartinez7733 5 ปีที่แล้ว +6

    🙏 Thank you so much, you saved my entire math class. 😂

  • @karmanyaahm
    @karmanyaahm 4 ปีที่แล้ว +3

    For some reason, I can't find this on the Khan Academy website

  • @homer007991
    @homer007991 14 ปีที่แล้ว +48

    Is there a video that shows how to determine a quadratic regression by hand?

    • @tuatarian6591
      @tuatarian6591 4 ปีที่แล้ว +2

      It's not simple at all, but the search term an internetter would be looking for is least squares quadratic regression

    • @thecodedmastergeodash8807
      @thecodedmastergeodash8807 3 ปีที่แล้ว +1

      @@tuatarian6591 How about a formula for it? Is that a thing? I know that the LINEAR regression equation is already complicated, so I'm not looking forward to the quadratic one, but would you know where to find it?
      (Also I'm seeing this comment 10 years ago and 10 months for the reply, what the heck?!)

    • @markhentges2
      @markhentges2 ปีที่แล้ว +1

      @@thecodedmastergeodash8807 you can use linear algebra to solve any degree regression using least squares

  • @skydutch08
    @skydutch08 5 ปีที่แล้ว +2

    ... so what's r^2 equal to and how do you use a calculator to find it? Trying to find how to calculate the regression itself

  • @likkledee3
    @likkledee3 14 ปีที่แล้ว +3

    great, I have a statistics tes ton this tomorrow, thanks.

  • @guerreirodas6flores441
    @guerreirodas6flores441 4 ปีที่แล้ว +3

    Ok, but i wanna know how to do it *by hand* and without a calculator.

  • @smeargleboy
    @smeargleboy 10 ปีที่แล้ว +8

    How do I do it without a calculator?

    • @Kamakwazee
      @Kamakwazee 9 ปีที่แล้ว

      That is fairly complicated as it uses multivariable calculus. If you would like to see the formulas, you can DM me.

    • @Kamakwazee
      @Kamakwazee 8 ปีที่แล้ว

      +dirk diggler Yeah. You can drop me an email at kamakwazee@gmail.com and I'll gather the formulas.

    • @mileswaugh
      @mileswaugh 5 ปีที่แล้ว

      I found this document. It might help? www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=12&cad=rja&uact=8&ved=2ahUKEwjj07DHqIrgAhVUGDQIHQMuD_0QFjALegQIChAC&url=https%3A%2F%2Fwww.farmingdale.edu%2Ffaculty%2Fsheldon-gordon%2FRecentArticles%2Fquadratic-regression-equation.doc&usg=AOvVaw1SRqApHbBqiWcHmAWbKBym
      edit: replaced typeo with "It" instead of "I"

  • @orbsandtea
    @orbsandtea 14 ปีที่แล้ว

    Ok, found out the theoretical height as a function of time in a vacuum:
    -(1/2)g t^2 + Vy0 t
    g= gravitational acceleration
    Vy0= starting velocity in the y direction
    And Vy0=40*sin(70)=37,6
    h(t)=-4,9t^2+37,6t Voila!
    We can solve for h=0 and get how long it takes before landing: t=7,67
    Finding velocity in x direction (stays constant because the only force, gravity, works at an 90 angle): Vx=37,6
    37,6m/s*7,67s=288m
    That ball'll travel 300 meters in a vacuum!
    I love MATHS!

  • @Samonomics
    @Samonomics 13 ปีที่แล้ว

    @pratiksrc is standard knowledge for projectiles, projectiles always follow a parabola - x^2 so quadratic dats why. its just summut you have to know for this example. ovawise its trial and error by looking at the graphs for the original data

  • @keithwalker7245
    @keithwalker7245 4 ปีที่แล้ว +1

    He forgot to enter 1.5 and 42.9

  • @shazaduh
    @shazaduh 14 ปีที่แล้ว

    Can't wait to see the computer algorithm for quadratic regression video. Do you think Excel would be better to illustrate this concept?

  • @TheKillerKaiser88
    @TheKillerKaiser88 5 ปีที่แล้ว

    If i want to do it but with an equation with terms c1-c2*x^2=y(x), how can i get it?

  • @pratiksrc
    @pratiksrc 13 ปีที่แล้ว +2

    how did u know that u were going to use quadratic regression.. why not linear or power3 regression.. anyone help please

    • @morgani.8167
      @morgani.8167 7 ปีที่แล้ว

      Pratik Dhakal he knew that bc the height value went down and did not vonstantly go up (linear)

    • @optionsuniversum3528
      @optionsuniversum3528 6 ปีที่แล้ว

      Also there is an analytical, theoretical solution for this, which we learned in our high schol physics class (back in the day), with aerodynamics (mainly drag) neglected and gravity being the sole influence changing the speed vector of the object (golf ball) once it is travelling. That analytical solution is quadratic.
      If you know beforehand that the relation should be quadratic (or, very predominantly quadratic in real life), you should use quadratic regression as well.

    • @swagless6719
      @swagless6719 4 ปีที่แล้ว

      @@optionsuniversum3528 To keep the time gap of these comments going boiiiiii

  • @purefatdude2
    @purefatdude2 14 ปีที่แล้ว +1

    what grade math is Quad regression

    • @IamArealLifeUnicorn
      @IamArealLifeUnicorn 5 ปีที่แล้ว +1

      5th

    • @gwen-pc2mo
      @gwen-pc2mo 2 ปีที่แล้ว

      Math 2 9th

    • @purefatdude2
      @purefatdude2 2 ปีที่แล้ว

      @@gwen-pc2mo bruh, that was 11 years ago. Definitely is not grade 9. I already taken grade 9 math even when I posted that comment.

  • @RageNadezz
    @RageNadezz 10 ปีที่แล้ว +2

    what is the point of this?

    • @Kabodanki
      @Kabodanki 10 ปีที่แล้ว

      Yeah I thought that we gonna learn how to calculate those coefficient, here it's just basic addition and multiplication

  • @elbay2
    @elbay2 14 ปีที่แล้ว

    @bryanfunk You can probably find a TI-85 emulator by using a Google search; I download an HP-15C emulator fairly easily.

  • @TranceAddict2
    @TranceAddict2 13 ปีที่แล้ว

    @purefatdude2 Grade of math as in level of math? I'm doing this stuff in Brief Calculus if that helps

  • @bryanfunk
    @bryanfunk 14 ปีที่แล้ว

    where can i get that calculator for my pc?

    • @swagless6719
      @swagless6719 4 ปีที่แล้ว +1

      I know it's ten years and most likey you graduate but . . . . . Use Desmos it might help
      XD skjsgfrfdgfd

  • @鸡腿塞牙
    @鸡腿塞牙 ปีที่แล้ว

    wow

  • @Venuhmz
    @Venuhmz 12 ปีที่แล้ว +7

    he missed one input lololol

    • @lafayette2957
      @lafayette2957 4 ปีที่แล้ว

      Venuhmz yeah I was like...wait what?

  • @purefatdude2
    @purefatdude2 13 ปีที่แล้ว

    @TranceAddict2 nvm
    u learn it in algbera 1

  • @icupfreely23
    @icupfreely23 13 ปีที่แล้ว

    @purefatdude2
    Year 11