Hi
I created the scratter chart and I would like to have another line, showing
the average, will go horizontal across the scratter chart.

Ex: 4,5,6,7,10 are data to create a scratter chart.
The averager of 4,5,6,7,10 is 6.4
May I use 6.4 to create a shot line (or a something )which will go
horizontal across the scratter chart.

Thank you
Chi