Hissuccessis afunctionof his havingworkedso hard.
Thelowtemperatureshere are afunctionof theterrainas much as of theclimate.
Differences inhealthoutcomesare often said to be afunctionofsocioeconomicdisparity.
Variation inwatersupplyis afunctionofgeography.
Theamountofwatervapourin theairis, inpart, afunctionoftemperature.