butwejustwantedtolistafewpossiblerelationstogivesomeexamples.Noteaswellthatwecouldalsogetotherorderedpairsfromtheequationandaddthoseintoanyoftherelationsaboveifwewantedto.Now
atthispointyouareprobablyaskingjustwhywecareaboutrelationsandthatisagoodquestion.Somerelationsareveryspecialandareusedatalmostalllevelsofmathematics.Thefollowingdefinitiontellsusjustwhichrelationsarethesespecialrelations.DefinitionofaFunctionAfunctionisarelationforwhicheachvaluefromthesetthefirstcomponentsoftheorderedpairsisassociatedwithexactlyonevaluefromthesetofsecondcomponentsoftheorderedpair.Okay
thatisamouthfull.Letâsseeifwecanfigureoutjustwhatitmeans.Letâstakealookatthefollowingexamplethatwillhopefullyhelpusfigureallthisout.©PaulDawkinsAlgebraâ198â