Respuesta :

It is going down by 5 so its like x-5 i believe

f(10) = 12.383472844799998f(11) = 14.860167413759998f(12) = 17.832200896511996f(13) = 21.398641075814393f(14) = 25.67836929097727f(15) = 30.814043149172722
hope I had helped