This is probably basic but I really tried to find the answer. "C-k" deletes from the cursor to the end of the line, but is there an analogous shortcut to delete a line backwards from the cursor point? Best
Try C-u 0 C-k - i.e. C-k with the prefix 0 kills from point to the start of the line. See the documentation for C-k (kill-line) for more information.