His earnings are 'directly proportional' to the number of units he sells.
The second game followed 'directly' [='immediately'] after the first.
Their house is 'directly' ahead. = It's 'directly' in front of us.
(..) - Lock onto him, R. - - Master, General Grievous’s ship is directly ahead– the one crawling with vulture droids. Oh, I see it. Oh, this is going to be easy. Oddball, do you copy? MAN ON HEADSET: Copy, Red Leader. (..)2005 Star Wars: Episode III - Revenge of the Sith