I want to use a multi-range selection as arguments for known_x and known_y
in the SLOPE() function.  If i am on, say, the known_y argument, and select
a range, and then press CTL and select another non-contiguous range, Excel
simply produced two ranges separated by commas, and this means that the
second selection is treated by Excel as the second argument ot the slope
function, i.e. the known_x argument, and not as a multi-area seleciton for
the frist argument to the function, the known_y argument.

Is it possible in some way to accomplish this?

Thanks,
tom