How can I have Numbers autofill interpolated values between two cells?

How can I have Numbers autofill interpolated values in a range of selected cells (from the value of the first cell to the value of the last cell)? I know how to do this with a formula but it's too awkward as I do this quite frequently. Therefore, I would like to use the Autofill function, or similar. But it doesn't seem to be intelligent enough to interpolate. Ex: […] […] […] ➾ [7.75] [8.5] [9.25]