anonymous
  • anonymous
for the following set of data find an appropriate regression equation (linear, exponential, or logarithmic) state your reason x: 1,2,3,4,5 y: 112,114, 119, 122, 129
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
ok so look at the y values you go from +2, +5, +3, +7, etc...what type of pattern do you think it is?
anonymous
  • anonymous
i mean you go from 112 to 114 by adding 2 etc
anonymous
  • anonymous
im not sure i dont know how to do this problem

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anonymous
  • anonymous
ok well i would define it as a piecewise function actually hold on.........hmmmm let me think about this
anonymous
  • anonymous
were looking for a regression equation such as exponential linear or logarithmic
anonymous
  • anonymous
yeah i know...i was just seeing if you could possibly use two different ones and define them only for when x is odd and another for when x is even...
anonymous
  • anonymous
yeah i thought it was exponential and linear but i'm not sure..
anonymous
  • anonymous
its definitely not log
anonymous
  • anonymous
did you plug it in your calculator?
anonymous
  • anonymous
yeah buts its not regression
anonymous
  • anonymous
why not ?
anonymous
  • anonymous
idk..its not perfect linear...
anonymous
  • anonymous
so now what
anonymous
  • anonymous
?
anonymous
  • anonymous
i would just say linear because there is no way to fit it to log or exp
anonymous
  • anonymous
how do you put this in the calculator i don't know how to
anonymous
  • anonymous
what calculator do you have?
anonymous
  • anonymous
ti-83
anonymous
  • anonymous
ok so turn it on go to stat go to edit you'll see like L1, L2, etc in L1 put in your x values and in L2 put the y values then quit do 2nd, Y= go to 1: go On then go zoom, go zoomfit
anonymous
  • anonymous
make sure in Y= that the plot1 is highlighted
anonymous
  • anonymous
ok now what
anonymous
  • anonymous
just go graph
anonymous
  • anonymous
its just points plotted..
anonymous
  • anonymous
haha i know now you can fit the graph
anonymous
  • anonymous
how?
anonymous
  • anonymous
ok so you want to go stat go to calc go to linreg(ax+b) then put L1, L2 after in the main screen
anonymous
  • anonymous
what do u mean main screen
anonymous
  • anonymous
the main screen is where you do all the math...like would do cos(30), 5+1, sqrt(9)...
anonymous
  • anonymous
when you click lin reg(ax+b) it will take you to the main screen
anonymous
  • anonymous
well after i hit lin reg then what
anonymous
  • anonymous
press 2nd 1 , 2nd 2 enter you get a linear regression y = 4.2x + 106.6
anonymous
  • anonymous
no i got 4x+ 107.4
anonymous
  • anonymous
did you enter it right? hmm........ press 2nd 0 scroll to actually no...that should not be correct
anonymous
  • anonymous
its close enough :)
anonymous
  • anonymous
okk what do i do now..
anonymous
  • anonymous
justify its linear...haha what stat is this for?
anonymous
  • anonymous
noo but shouldnt there be a line going through those points ?
anonymous
  • anonymous
yeah but look at the graph... do you know the concept of a floor? its like the greatest integer function...and then add like one to it...that should make it approximate. idk unless it has to be regression....then you could try exponential shifted way up...but its the 4th term that makes me question that possibility...
anonymous
  • anonymous
do i plug the linear regression into y=?
anonymous
  • anonymous
yeah the equation is supposed to be an approximate for the data
anonymous
  • anonymous
but both the linear regression and exponential equations lie in the same place?
anonymous
  • anonymous
...what?
anonymous
  • anonymous
when i plug the linear regression equation into the y= i end up with a line going across the graph and then when i plug in the exponential regression into the y= the line lays in the same place as the linear regression equation line
anonymous
  • anonymous
is your data correct? idk but i gotta go so when is this due? monday? i can try to help you tomorrow or something...
anonymous
  • anonymous
yea i put 113 instead of 112
anonymous
  • anonymous
107.1678132(1.035666278^x) is tht the expreg?

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