Posted by just wondering on Sunday, April 4, 2010 at 1:11pm.
what is sin regression?

grd 11  bobpursley, Sunday, April 4, 2010 at 2:11pm
You have much more success looking for sine regression
y= a * sine(bx+c) + d
You will find it here, but I suspect you need to be looking in your TI83 calulator book.
http://en.wikipedia.org/wiki/Leaving_Home#Main_Characters