Owen Duffy wrote:
Yes, it does also have a constant slope (of zero), so you will ba able
to argue a correct interpetation either way, even if the results are
different.

OK, I will change my statement to a "constant non-zero
slope". I really think that what's Reg meant but obviously
only Reg's opinion is important on that matter. :-)

Reg will no doubt
chuckle when he wakes in the morning.

:-) When I chuckle with a hangover, it hurts. :-)
--
73, Cecil http://www.qsl.net/w5dxp