Cool

2. VARIABLES
 Isacharacteristics,numberorquantitythatis
beingmanipulatedorchangeduringascientific
investigationwhenperformunderspecificor
varyingsituations.

3. PLOT
 Agraphicrepresentation(suchasachart)
RELATIONSHIP
 Astateofbeingrelatedorinterrelated

4. VERTICALLINE
 Isastraightlinegoingstraightupordownfroma
levelsurfaceorfromthetoptothebottom .
HORIZONTALLINE
 Isastraightlinethatgoesfromlefttorightorright
toleft.

5. Itisveryimportanttounderstandrelationship
betweenvariablestodrawtherightconclusion
fromastatisticalanalysis.Therelationship
betweenvariablesdetermineshowtheright
conclusionsarereached.Withoutan
understandingofthis,youcanfallintomany
pitfalls theaccompany statisticalanalysisand
inferwrongresultsfromyourdata.

6. Relationshipsbetweenvariablescanbe
describedas:
 Linearrelationship(positiveandnegative)
 Nonlinearrelationship(monotoneandnon-
monotone)
 UnrelatedorNorelationship

7. LinearRelationship
 Generallyberepresentedandexplainedbya
straightlineonascatterplot.
 Directlyproportional(PositiveLinear
Relationship)
 Inverselyproportional(Negativelinear
Relationship)

8. NonlinearRelationship
 Whenonevariableisdoubling theothervariablewill
notdoubleCanberepresentedbyacurvedline.
 MonotoneOnedoesnotvaryorchangeitsrepresented
byonecurveordip
 Non-monotoneSomethingwhichcanvaryaccording
tothesituationorcondition.Itsrepresentedbytwoor
morecurvesordips

9. UnrelatedorNoRelationship
Havenosystematicrelationships, changes
inonevariablesimplyarenotrelatedtothe
changesintheothervariables.
Thechangesinthevalueofthevariablesare
duetorandomevents,nottheinfluenceof
oneupontheother.

10. STEPS IN PLOTING
THE VARIABLES
USING A GRAPH

11. 1. Drawagraphwiththeindependentvariable
ontheVerticalaxis/Y-axisandthe
dependentvariableontheHorizontal
axis/X-axisDonotforgettolabeltheaxes
andthegraph.

12. 2.Foreachpairofdata,putadotor
asymbolwherethex-axisvalue
intersectsthey-axisvalue.

13. 3.Lookandconnect thepatternof
pointstoseeifarelationshipis
obvious.