I would like to install CUDA 9.2. on Linux Mint 19.
It was possible to install CUDA on Linux Mint 18.3 even though Linux Mint is not an officially supported distribution. However, Linux Mint 18 was based on Ubuntu 16.04, while the newer Linux Mint 19 is based on Ubuntu 18.04 (wikipedia).
Ubuntu 18.04 seems to have a super easy solution (most popular answer) which is also tempting but I would prefer to avoid switching distros if I can avoid it.