Posted by mysterychicken on Thursday, June 20, 2013 at 11:51am.
No clue how to solve this.
If you have performed a linear regression of data that ranges from 110 and has a y=2x+5, what is the extrapolated value for y at 11

Math  Steve, Thursday, June 20, 2013 at 12:01pm
this is easier than you are trying to envision it. You have a bunch of data, and you have found that the straight line of best fit is
y = 2x+5
You have no real formula that produces every data point in the interval [1,10], but this line does as well as you can.
So, now you have a line which closely fits all observed data. To extrapolate to other data, all you can do is estimate based on your calculations so far.
y(11) = 27

Math  mysterychicken, Thursday, June 20, 2013 at 12:13pm
Thanks
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