Re: Scatter plot
In Excel, using the default cell format, all numbers are automatically right aligned and all text strings are left aligned.
Your data are right aligned - hard to tell if this due to a formatting change or if these are really text values that appear as numbers - the "numbers" appear to be data strings.
The row-1 cells should be header cells.
Suggest you create a new table with valid header and numbers, using default format or a number format then try to create the chart.