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

Question

anonymous · Answer

$$\sum_{n=1}^{3}i^(n-1)$$

anonymous · Answer

in the second equation the right side of the sigma should read i^(n-1)

bahrom7893 · Answer

do you mean i as in imaginary number?

bahrom7893 · Answer

$$\sum_{n=1}^{3}i^{(n-1)}$$
where i^2 =-1?

anonymous · Answer

yes

bahrom7893 · Answer

$$\sum_{n=1}^{3}i^{n-1} = i^{1-1} + i^{2-1} + i^{3-1}$$

bahrom7893 · Answer

$$i^0 + i + i^2 = 1 + i -1 = i$$

anonymous · Answer

okay thats what i got, thank you. can you take a look at the problem above that

bahrom7893 · Answer

oh for that u need to use a calculator, do u want me to write the equation of the line?

anonymous · Answer

yeah i understand that but how would you know which type of regression to use?

bahrom7893 · Answer

I think you just try every single one, and the one that goes through the most points will be the one to use, because calculator would approximate all equations. So just try all three, and whichever one comes closest to as many points as possible will be the one to use.

bahrom7893 · Answer

well, that's how I used to do it, back in hs

anonymous · Answer

how do i graph it? i put in the type of regression and then (L1,L2) then how do I graph it?

bahrom7893 · Answer

okay what calculator are you using?

bahrom7893 · Answer

Ti 84? 89? 83?

anonymous · Answer

TI-83

bahrom7893 · Answer

http://www.mathstore.net/graphing-calculators/TI-84/how-to-linear-regression.php

anonymous · Answer

yeah i got that but my graph axis are bolded i dont know how to get out of that i clicked zoom out a couple of times but it wont work

bahrom7893 · Answer

try zoom fit

anonymous · Answer

its not doing antyhing

bahrom7893 · Answer

try decimal

anonymous · Answer

what does that mean?

anonymous · Answer

i got it thank you

bahrom7893 · Answer

okay i gtg now and that meant zoom decimal

anonymous · Answer

nothings graphing though

bahrom7893 · Answer

which means u have to try a different regression

bahrom7893 · Answer

and make sure the plots are selected in the y-editor

bahrom7893 · Answer

sorry i gtg now, will try to respond later again

anonymous · Answer

yeah they are

anonymous · Answer

ok thanks