Graphitusingthegraphingcalculator.Whatdoyousee?Hole Ifx–bisafactorofboththenumeratoranddenominatorofarationalfunction,thenthereisaholeinthegraphofthefunctionwherex=b,unlessx=bisaverticalasymptote.*Thisisthefactorthatcancels Theexactpointoftheholecanbefoundbypluggingbintothefunctionafterithasbeensimplified.