On Aug 15, 6:10 pm, djh <firstname.lastname@example.org> wrote: > Your geometric explication is what I have assumed to be the case; > nonetheless, thanks for the taking the time to spell everything out in > detail - very much appreciated. > > But here's my question. > > For x1 on (x2,x3), Excel reports two slopes, which I assume to be the > slopes of your two lines in the (x1,x2) and (x1,x3) planes. > > Excel also reports a single intercept, which I assume to be the > intercept of your plane on the x1 axis. > > And if this assumption is correct, isn't it also the case that the two > lines (in the (x1,x2) and (x1,x3) planes) intersect at this intercept > (given the fact that these two lines define the plane with this > intercept)? > > Or do I have it all totally bolloxed-up?