Aconsumerisconsideringtwodifferentpurchasingoptionsforthecaroftheirchoice.Thefirstoption,whichisleasing,isdescribedbytheequation250x-y+4000=0wherexrepresentsthenumberofmonthsofownershipandyrepresentsthetotalpaidforthecarafter‘x'months.Thesecondoption,whichisthefinancingoption,willcost$400for0monthsofownership,(0,400),and$4400for10monthsofownership,(10,4400).
Findtheequations,inslope/y-interceptform,foreachofthepurchasingoptions.Explainthesignificanceoftheslopeandy-interceptforeachpurchasingoption.
如果用全英文来打的话,