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1、Mag‐oosh 数学‐Data Interpretation整理by EndiesDataInterpretation-附解析一Thegraphaboveshowsthetotalsales,inmillionsofdollars,forthreecompanies,A&B&C,inaparticularsectorfortheyears1998through2007inclusive.Assumethesecompaniesaretheonlythreecompaniesactiveinthispartic
2、ularsector.CompanyAisrepresentedbyasolidblackline;CompanyBisrepresentedbytheblacklinewithlargedashes;CompanyCisrepresentedbythegraylinewithsmalldashes.CompaniesA&Bexistedsincethe1980s,althoughonlydatafrom1998isshown.CompanyC'sfirstyearinexistencewas2000.1Tot
3、alsales,byallcompaniesinthesector,increasedbyapproximatelywhatpercentfrom1998to2007?!46%!72%!100%!153%!300%Weknowthesethreecompaniesaretheonlycompaniesinthesector,sothenumbersshownonthechartaccountforallsalesinthesector.In1998,companyBwasatabout5M,andcompany
4、Awasabout81M,foratotalof86M.In2007,Awasat20M,Bwasat32M,andCwasat120M,foratotalof172M.Approximate172/86as170/85=2---salesinthesectormoreorlessdoubled,whichisabout100%increase.Answer=(C).Amoreprecisecalculation:Mag‐oosh 数学‐Data Interpretation整理by EndiesAnswer=
5、(C).2companyCwasresponsibleforapproximatelywhatpercentoftotalsalesinthesectorin2007?!24%!40%!55%!70%!93%In2007,Awasat20M,Bwasat32M,andCwasat120M,foratotalof172M.Whatpercentof172is120?Let'sapproximatethis:10%of172isapproximately17,so20%is34and30%is51.Well,51i
6、sapproximatelyequaltothesumofA&B'ssales---iftheyaccountfor30%,thatmustmeanCaccountsfor70%.Answer=(D).Amoreprecisecalculation:whichweroundto70%.Answer=(D).3From2002to2003,CompanyChadwhatpercentageincreaseinitstotalsales?!26%!53%!78%!90%!112%CompanyC,thegray-d
7、ashedlinewithtriangles,hadanapproximatevaluealittle$50Minsalesin2002,andabout$110Min2003.That'smorethandouble,whichismorethan100%increase.Only(E)isinthatrange,sothat'stheanswer.Amoreprecisecalculation:Mag‐oosh 数学‐Data Interpretation整理by EndiesAnswer=(E).二The
8、diagramshowsthe44nationsthatoccupythecontinentofEurope.(ThediagramexcludesRussia,whichoccupiesbothEurope&Asia.)Everydotisasmallernation,withanationalpopulationlessthan500,000;thecirclesarenation
