directly proportional(proportional to a constant multiple of an independent variable) adjective [UK: dɪ.ˈrekt.li prə.ˈpɔːʃ.n̩əl] [US: də.ˈrekt.li prə.ˈpɔːr.ʃn̩əl]
nepřímo úměrnýadjective
inversely proportional(proportional to the reciprocal of the independent variable) adjective [UK: ɪn.ˈvɜː.sli prə.ˈpɔːʃ.n̩əl] [US: ˌɪn.ˈvɝː.sli prə.ˈpɔːr.ʃn̩əl]