When I graphed in on my calculator I got this and I think that is cubic?
This 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?
It 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
is there any methods you look at besides just plotting points?
No is there other methods to determine what they are?
well 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
wait no sorry misread
it look like it come up with three options for best fit
either a quartic or cubic or a quadratic for that one
I thought quadratic was like what I drew above?
it could also be upside down
look at the graphs in that picture
against the points we were to plot
it likes the blue curve is closest
which is the quartic
So the first one is cubic and the second one quartic?
both 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
is it just plotting points a method in your class? or are there others?
I learning about polynomial regression this unit and we primarily use the ti-84 for this which is what I was shown
if 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
but if we wanted to get a better graph we would go with the quartic
to best fit the points
@Loser66 what do you think
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 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)
|dw:1444329561722:dw| I would agree this makes me think of a cubic because of ...
but like I said quartic would be even better as the graphs in wolfram suggested
@freckles so you think that the first one is cubic like I thought but what do you think the second one is?
I thought the first one look like this: |dw:1444329869071:dw| and the second one look like this: |dw:1444329880021:dw|
the first one reminds me of a cubic and the second one reminds of a quadratic
but I could be wrong
Ok thanks, my drawings at the top did not exactly represent what I got on my calculator it was just a general sketch.
I don't like the these two questions if you couldn't tell
Yeah I could tell lol me neither
It seems to be opinion based if you guys are really just plotting points as a method
I mean we definitely wouldn't say a line
Yeah that's for sure its just been confusing to me
good luck let me know if you get the questions right
@peachpi what do you think
I agree with @freckles the first one looks cubic, the second looks quadratic
Ok thank you :)
@freckles The first one is cubic but the second one was not quadratic do you think it was quartic?
do you think my guess is really going to be better than yours? :p
maybe 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
oh ok maybe but I thank you for taking the time to help me :)
i'm sorry I wasn't better at the guessing part :p
|dw: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)
they 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
I was looking at some other graphs and it looks like it could very well be quartic is that what wolf math said?
well wolfram said that quartric would be a good fit for both so it makes me worry since that one question accepted cubic
I see what you mean, this question is such a nightmare lol
quartic is my final guess I'm done it could be wrong just so you know
well hey before you click it
lol so you are just suppose to put those points in the calculator and that is it right?
like you don't have to click in other things just look at the graph right?
well that sucks
Yeah I will let you know I have two more times to answer this
or to re answer I should say and if its not quartic we will try cubic and get to the bottom of this :)