If you are not getting all the poits then you probably have more than one
series. the Trendline will only work on a single series. You would have to
add a seperate trendline for each series.

"Anthony Blackburn" wrote:

I am making a scatter chart. I want to put a trend line in it, but I can't
seem to select all of the datapoints in the chart. I right click on a
datapoint and only a few are selected.

How do I make a trendline based on ALL of the scatter shot data points?

Thanks