I have 2 spreadsheets, each with data in the x-axis range of 0 to 400. In one spreadsheet, the chart displays 0 to 500  (400-500 has no data). In the other spreadsheet, the chart displays -100 to 500 (no data for x -100 to 0, and 400 to 500). I don't want to display x axis ranges where no data exists. If my data range is 0 to 400, I'd like the chart to display 0 to 400. Any suggestions on how to control the x-axis range displayed in my scatter line charts?