2.1 Transformers: Shifty y’s - MR. CONGLETON · 2.1 Transformers: Shifty y’s A Develop...
Transcript of 2.1 Transformers: Shifty y’s - MR. CONGLETON · 2.1 Transformers: Shifty y’s A Develop...
SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.1
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2.1 Transformers: Shifty y’s
A Develop Understanding Task
OptimaPrimeisdesigningarobotquiltforhernewgrandson.Sheplansfortherobottohaveasquareface.Theamountoffabricthatsheneedsforthefacewilldependontheareaoftheface,soOptimadecidestomodeltheareaoftherobot’sfacemathematically.SheknowsthattheareaAofasquarewithsidelengthxunits(whichcanbeinchesorcentimeters)ismodeledbythefunction, ! ! = !!squareunits.1. Whatisthedomainofthefunction! ! inthiscontext?
2. Matcheachstatementabouttheareatothefunctionthatmodelsit:MatchingEquation
(A,B,C,orD)
Statement FunctionEquation
Thelengthofeachsideisincreasedby5units.
A) AB) !(!) = 5!!
Thelengthofeachsideismultipliedby5units.
C) BD) ! = (! + 5)!
Theareaofasquareisincreasedby5squareunits.
E) CF) ! = (5!)!
Theareaofasquareismultipliedby5. G) DH) ! = !! + 5
Optimastartedthinkingaboutthegraphof! = !!(inthedomainofallrealnumbers)andwonderingabouthowchangestotheequationofthefunctionlikeadding5ormultiplyingby5affectthegraph.Shedecidedtomakepredictionsabouttheeffectsandthencheckthemout.
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SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.1
Mathematics Vision Project
Licensed under the Creative Commons Attribution CC BY 4.0 mathematicsvisionproject.org
3. Predicthowthegraphsofeachofthefollowingequationswillbethesameordifferentfromthegraphof! = !!.
Similaritiestothegraphof! = !!
Differencesfromthegraphof! = !!
! = 5!!
! = (! + 5)!
! = (5!)!
! = !! + 5
4. Optimadecidedtotestherideasusingtechnology.Shethinksthatitisalwaysagoodideatostartsimple,soshedecidestogowith! = !! + 5.Shegraphsitalongwith! = !!inthesamewindow.Testityourselfanddescribewhatyoufind.
5. Knowingthatthingsmakealotmoresensewithmorerepresentations,Optimatriesafewmoreexampleslike! = !! + 2 and! = !! − 3,lookingatbothatableandagraphforeach.Whatconclusionwouldyoudrawabouttheeffectofaddingorsubtractinganumberto! = !!?Carefullyrecordthetablesandgraphsoftheseexamplesinyournotebookandexplainwhyyourconclusionwouldbetrueforanyvalueofk,given,! = !! + !.
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SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.1
Mathematics Vision Project
Licensed under the Creative Commons Attribution CC BY 4.0 mathematicsvisionproject.org
6. Afterheramazingsuccesswithadditioninthelastproblem,Optimadecidedtolookatwhathappenswithadditionandsubtractioninsidetheparentheses,orasshesaysit,“addingtothe!beforeitgetssquared”.Usingyourtechnology,decidetheeffectofhintheequations:! = (! + ℎ)!and! = (! − ℎ)!.(Choosesomespecificnumbersforh.)Recordafewexamples(bothtablesandgraphs)inyournotebookandexplainwhythiseffectonthegraphoccurs.
7. Optimathoughtthat#6wasverytrickyandhopedthatmultiplicationwasgoingtobemorestraightforward.Shedecidestostartsimpleandmultiplyby-1,soshebeginswith! = −!!.Predictwhattheeffectisonthegraphandthentestit.Whydoesithavethiseffect?
8. Optimaisencouragedbecausethatonewaseasy.Shedecidestoendherinvestigationforthedaybydeterminingtheeffectofamultiplier,a,intheequation:! = !!!.Usingbothpositiveandnegativenumbers,fractionsandintegers,createatleast4tablesandmatchinggraphstodeterminetheeffectofamultiplier.
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SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.1 2.1
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SET
Topic:TransformationsonquadraticsMatching:Choosetheareamodelthatisthebestmatchfortheequation.
______11.x! + 4 ______12. x + 4 ! ______13. 4x ! _______14.4x!a. b.
c. d.
x -3 -2 -1 0 1 2 3f(x)=x2 9 4 1 0 1 4 9
15a)g(x)= b)x -3 -2 -1 0 1 2 3g(x) 2 -3 -6 -7 -6 -3 2
c) Inwhatwaydidthegraphmove?d) Whatpartoftheequationindicatesthismove?
Atableofvaluesandthegraphforf(x)=x2isgiven.Comparethevaluesinthetableforg(x)tothoseforf(x).Identifywhatstaysthesameandwhatchanges.a)Usethisinformationtowritethevertexformoftheequationofg(x).b)Graphg(x).c)Describehowthegraphchangedfromthegraphoff(x).Usewordssuchasright,left,up,anddown.d)Answerthequestion.
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SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.2
Mathematics Vision Project
Licensed under the Creative Commons Attribution CC BY 4.0 mathematicsvisionproject.org
2.2 Transformers: More Than
Meets the y’s
A Solidify Understanding Task
Writetheequationforeachproblembelow.Useasecondrepresentationtocheckyourequation.1. Theareaofasquarewithsidelengthx,wherethesidelengthisdecreasedby3,theareaismultipliedby2andthen4squareunitsareaddedtothearea.
2.
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SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.2
Mathematics Vision Project
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3.
4.
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SECONDARY MATH II // MODULE 2
STRUCTURES OF EXPRESSIONS – 2.2
Mathematics Vision Project
Licensed under the Creative Commons Attribution CC BY 4.0 mathematicsvisionproject.org
Grapheachequationwithoutusingtechnology.Besuretohavetheexactvertexandatleasttwocorrectpointsoneithersideofthelineofsymmetry.
5. ! ! = −!! + 3
6. ! ! = (! + 2)! − 5
7. ℎ ! = 3(! − 1)! + 2
8. Given:! ! = !(! − ℎ)! + !a. Whatpointisthevertexoftheparabola?
b. Whatistheequationofthelineofsymmetry?
c. Howcanyoutelliftheparabolaopensupordown?
d. Howdoyouidentifythedilation?
9. Doesitmatterinwhichorderthetransformationsaredone?Explainwhyorwhynot.
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