Hi,
I've seen other similar questions, but have not seen a response that works for me. I created a pivot chart from a pivot table. 
I also created a "regular" scatter-plot chart from a pivot table (before I learned about pivot charts.)


I would like the pivot chart's x-axis to have a similar format to the "regular" chart with equally spaced - by value, not unit - within a given range with editable bounds. The circles will still denote the plot points, but the distance between 2.5 and 3.5 should be equal to the distance between 4.5 and 5.5. The labels should be whole numbers.
How can I make this happen (preferably using small steps accompanied by pictures?) Here are the format settings for the data set, and changing it to "sum" produces no change to the chart:
The format axis feature does not give the same choices as that for the scatter plot (with bounds and distribution). I've played with various settings without success. 
Thanks, in advance, for your help!