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1、智课网IELTS备考资料雅思小作文——线形图（LineGraphs）摘要：线形图是雅思写作Task1里常考的图形之一，其写作非常值得我们深入研究。现专供以下学习材料，希望能对各位“雅友”的线形图写作带去一些启发和帮助。线形图是雅思写作Task1里常考的图形之一，其写作非常值得我们深入研究。现专供以下学习材料，希望能对各位“雅友”的线形图写作带去一些启发和帮助。LinegraphsLinegraphsaremorepopularthanallothergraphscombinedbecauseth
2、eirvisualcharacteristicsrevealdatatrendsclearlyandthesegraphsareeasytocreate.Linegraphs,especiallyusefulinthefieldsofstatisticsandscience,areoneofthemostcommontoolsusedtopresentdata.Alinegraphisavisualcomparisonofhowtwovariables—shownonthex-andy-axes
3、—arerelatedorvarywitheachother.Itshowsrelatedinformationbydrawingacontinuouslinebetweenallthepointsonagrid.Forinformationontheshapesoflinegraphs,seetheOrganizingdatachapter.Linegraphscomparetwovariables:oneisplottedalongthex-axis(horizontal)andtheoth
4、eralongthey-axis(vertical).They-axisinalinegraphusuallyindicatesquantity(e.g.,dollars,litres)orpercentage,whilethehorizontalx-axisoftenmeasuresunitsoftime.Asaresult,thelinegraphisoftenviewedasatimeseriesgraph.Forexample,ifyouwantedtographtheheightofa
5、baseballpitchovertime,youcouldmeasurethetimevariablealongthex-axis,andtheheightalongthey-axis.Althoughtheydonotpresentspecificdataaswellastablesdo,linegraphsareabletoshowrelationshipsmoreclearlythantablesdo.Linegraphscanalsodepictmultipleserieswhicha
6、reusuallythebestcandidatefortimeseriesdataandfrequencydistribution.Barandcolumngraphsandlinegraphsshareasimilarpurpose.Thecolumngraph,however,revealsachangeinmagnitude,whereasthelinegraphisusedtoshowachangeindirection.Insummary,linegraphsshowspecific
7、valuesofdatawellrevealtrendsandrelationshipsbetweendatacomparetrendsindifferentgroupsofavariableGraphscangiveadistortedimageofthedata.Ifinconsistentscalesontheaxesofalinegraphforcedatatoappearinacertainway,thenagraphcanevenrevealatrendthatisentirelyd
8、ifferentfromtheoneintended.Thismeansthattheintervalsbetweenadjacentpointsalongtheaxismaybedissimilar,orthatthesamedatachartedintwographsusingdifferentscaleswillappeardifferent.Example1–PlottingatrendovertimeFigure1showsoneobvioustrend,thefluctuationi
