Thanks to everyone who tried to help me.
The answer was so simple, I just couldn't see the wood for the trees.
There really wasn't a problem in the first place.
First, I would get my Line Graph OK.
Next I would create the Trend Line.
Next I would make the background white.
Then I would make my graph line white (invisible).
The graph line became invisible, and I had the Trend Line, great,
but then all the big black points of the Graph Line became visible.
I became absolutely f.f.fr.fr.frustrated!! Going crazy!!
The black points became a mind block.
I could not see past the black points for ages.
Then one day I took another step,
I just clicked on an empty part of the chart, and voila,
the Graph Line points just went away.
I felt a right, royal twit.
Nev.
"Marc" wrote ...