Ziveliswa njani iiNqanaba zoTshintsho

NguMark Ryan

Umahluko yinkqubo yokufumana ezivela kwezinye . Isiphumo somsebenzi sikuxelela ukuba ukhawuleza kangakanani umahluko wemveliso (njenge Y ) iyatshintsha ngokuthelekiswa nokwahluka kokufaka (njenge x ).



Umzekelo, ukuba Y iyanda amaxesha ama-3 ngokukhawuleza x - Njengomgca Y = 3 x + 5 - emva koko uthi isiphumo Y siyakuhlonipha uku x ilingana no-3, kwaye uyabhala

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Oku, kunjalo, kuyafana



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kwaye oko akuthethi nto ngaphezulu kokuthetha ukuba inqanaba lotshintsho lwe Y kuthelekiswa ne x ikwi-3-to-1 ratio, okanye umgca unethambeka

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Qhelisela imibuzo

Le mibuzo ilandelayo yokuziqhelanisa igxininisa into yokuba isiseko sisiseko nje okanye ithambeka. Ukusombulula ezi ngxaki, konke okufuneka ukwenze kukuphendula imibuzo ngokungathi bakucelile ukuba umisele inqanaba okanye ithambeka endaweni yesiphumo.

  1. Ukuba ushiya ikhaya lakho ngexesha = 0, kwaye ukhawuleze uhambe ngemoto yakho ngeemayile ezingama-60 ngeyure, yintoni

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    Ikhowudi yeTylenol w 3

    isiphumo sokuma kwakho malunga nexesha?

  2. Yintoni ithambeka leparabola

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    kwinqanaba (7, 9)? (Jonga lo mzobo ulandelayo.)

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Iimpendulo neengcaciso

  1. Impendulo yile

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    Isiphumo sisoloko singumlinganiselo, kwaye (ucinga ukuba uthetha ngamazinga akhawulezileyo, hayi amaxabiso aphakathi) ireyithi ihlala ivela kwisiphumo. Ke, ukuba isantya sakho, okanye inqanaba, kunjalo

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    isiphumo,

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    ikwayi-60.

  2. Ithambeka liyi-3.

    Uyabona ukuba umgca, Y = 3 x - 12, ubambekile kwiparabola,

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    kwinqanaba (7, 9). Uyazi ukusuka Y = mx + b ukuba ithambeka Y = 3 x - 12 ngu 3. Kwinqaku (7, 9), iparabola ifana ncam nomgca, ngoko ke isiphumo esivela (ithambeka) le parabola e (7, 9) ikwa-3.

    Nangona ithambeka lomgca lihlala lihleli, ithambeka leparabola liyatshintsha njengoko unyuka usuka (7, 9), uyehla uyehla. Nokuba uya ngasekunene nje 0.001 ukuya x = 7.001, ithambeka alisayi kuba ngokuchanekileyo 3.

    iipilisi nge-627