New a worksheet with 3 column of data, plot Scatter
Open NLFit dialog with graph, pick for example LineExp function from Multiple Variables category
Go to Data Selection page on Settings tab, expand the Input Data node, and set col(C) as y2
Go to Output page, make sure Output>Graph>Result Table is set as Source Graph, or Source and Report Graphs, click OK
==> No results table added on the source graph