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KJ4UTS
 one year ago
Determine whether a linear, quadratic, cubic or quartic polynomial best fits the data.
KJ4UTS
 one year ago
Determine whether a linear, quadratic, cubic or quartic polynomial best fits the data.

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KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1When I graphed in on my calculator I got this and I think that is cubic?

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1This is what I got for the second problem when I graphed it on my calculator and I think its cubic also but am not sure?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5It seems like a cubic would best fit the data... however this one looks more cubic http://www.wolframalpha.com/input/?i=plot+%280%2C32%29%2C%284%2C45%29%2C%288%2C36%29%2C%2812%2C31%29%2C%2816%2C24%29%2C%2820%2C29%29 then this one http://www.wolframalpha.com/input/?i=plot+points+%281965%2C98%29%2C%281970%2C86%29%2C%281975%2C58%29%2C%281980%2C24%29%2C%281985%2C34%29%2C%281990%2C46%29 a quadratic might even do for this graph

freckles
 one year ago
Best ResponseYou've already chosen the best response.5is there any methods you look at besides just plotting points?

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1No is there other methods to determine what they are?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5well there is polynomial least squares thingy http://www.wolframalpha.com/input/?i=least+squares+%281965%2C98%29%2C%281970%2C86%29%2C%281975%2C58%29%2C%281980%2C24%29%2C%281985%2C34%29%2C%281990%2C46%29 this method come up with a 4th deg polynomial

freckles
 one year ago
Best ResponseYou've already chosen the best response.5wait no sorry misread

freckles
 one year ago
Best ResponseYou've already chosen the best response.5it look like it come up with three options for best fit

freckles
 one year ago
Best ResponseYou've already chosen the best response.5either a quartic or cubic or a quadratic for that one

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1I thought quadratic was like what I drew above?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5it could also be upside down

freckles
 one year ago
Best ResponseYou've already chosen the best response.5look at the graphs in that picture

freckles
 one year ago
Best ResponseYou've already chosen the best response.5against the points we were to plot

freckles
 one year ago
Best ResponseYou've already chosen the best response.5it likes the blue curve is closest

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1So the first one is cubic and the second one quartic?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5both according to the graphs there are quartic though for that one cubic is a close second if you try the same coding I typed in earlier into wolfram though you should probably use the methods that were talked about in your class whatever methods those were

freckles
 one year ago
Best ResponseYou've already chosen the best response.5is it just plotting points a method in your class? or are there others?

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1I learning about polynomial regression this unit and we primarily use the ti84 for this which is what I was shown

freckles
 one year ago
Best ResponseYou've already chosen the best response.5if you guys are just plotting points, it seems very opinion like to me... dw:1444329367542:dw because to me this kinda makes me think of quadratic

freckles
 one year ago
Best ResponseYou've already chosen the best response.5dw:1444329423580:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.5but if we wanted to get a better graph we would go with the quartic

freckles
 one year ago
Best ResponseYou've already chosen the best response.5to best fit the points

freckles
 one year ago
Best ResponseYou've already chosen the best response.5@Loser66 what do you think

freckles
 one year ago
Best ResponseYou've already chosen the best response.5http://www.wolframalpha.com/input/?i=plot+points+%281965%2C98%29%2C%281970%2C86%29%2C%281975%2C58%29%2C%281980%2C24%29%2C%281985%2C34%29%2C%281990%2C46%29 http://www.wolframalpha.com/input/?i=plot+%280%2C32%29%2C%284%2C45%29%2C%288%2C36%29%2C%2812%2C31%29%2C%2816%2C24%29%2C%2820%2C29%29 we are just suppose to plot these points and just guess what graph best fits (we don't need least squares method or whatever)

freckles
 one year ago
Best ResponseYou've already chosen the best response.5dw:1444329561722:dw I would agree this makes me think of a cubic because of ...

freckles
 one year ago
Best ResponseYou've already chosen the best response.5dw:1444329593289:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.5but like I said quartic would be even better as the graphs in wolfram suggested

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1@freckles so you think that the first one is cubic like I thought but what do you think the second one is?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5I thought the first one look like this: dw:1444329869071:dw and the second one look like this: dw:1444329880021:dw

freckles
 one year ago
Best ResponseYou've already chosen the best response.5the first one reminds me of a cubic and the second one reminds of a quadratic

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1Ok thanks, my drawings at the top did not exactly represent what I got on my calculator it was just a general sketch.

freckles
 one year ago
Best ResponseYou've already chosen the best response.5I don't like the these two questions if you couldn't tell

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1Yeah I could tell lol me neither

freckles
 one year ago
Best ResponseYou've already chosen the best response.5It seems to be opinion based if you guys are really just plotting points as a method

freckles
 one year ago
Best ResponseYou've already chosen the best response.5I mean we definitely wouldn't say a line

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1Yeah that's for sure its just been confusing to me

freckles
 one year ago
Best ResponseYou've already chosen the best response.5good luck let me know if you get the questions right

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1@peachpi what do you think

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I agree with @freckles the first one looks cubic, the second looks quadratic

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1@freckles The first one is cubic but the second one was not quadratic do you think it was quartic?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5do you think my guess is really going to be better than yours? :p

freckles
 one year ago
Best ResponseYou've already chosen the best response.5maybe you were right to think they were both cubics in the beginning that was your first guess sometimes are first guess is the right guess

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1oh ok maybe but I thank you for taking the time to help me :)

freckles
 one year ago
Best ResponseYou've already chosen the best response.5i'm sorry I wasn't better at the guessing part :p

freckles
 one year ago
Best ResponseYou've already chosen the best response.5dw:1444331902570:dw they were suppose to plot points I thought the polynomial that best fit this was a quadratic what do you think? (also quadratic was marked wrong)

freckles
 one year ago
Best ResponseYou've already chosen the best response.5they had other options like linear, cubic, quartic, none of these we already can throw out linear so it is either cubic or quartic or neither

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1I was looking at some other graphs and it looks like it could very well be quartic is that what wolf math said?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5well wolfram said that quartric would be a good fit for both so it makes me worry since that one question accepted cubic

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1I see what you mean, this question is such a nightmare lol

freckles
 one year ago
Best ResponseYou've already chosen the best response.5quartic is my final guess I'm done it could be wrong just so you know

freckles
 one year ago
Best ResponseYou've already chosen the best response.5well hey before you click it

freckles
 one year ago
Best ResponseYou've already chosen the best response.5lol so you are just suppose to put those points in the calculator and that is it right?

freckles
 one year ago
Best ResponseYou've already chosen the best response.5like you don't have to click in other things just look at the graph right?

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1Yeah I will let you know I have two more times to answer this

KJ4UTS
 one year ago
Best ResponseYou've already chosen the best response.1or to re answer I should say and if its not quartic we will try cubic and get to the bottom of this :)
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