Video: Yuav ua li cas koj sau ib tug ncaj variation sib npaug?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txij li thaum k yog qhov tsis tu ncua (zoo ib yam rau txhua lub ntsiab lus), peb tuaj yeem pom k thaum muab ib qho taw tes los ntawm kev faib cov y-coordinate los ntawm x-coordinate. Piv txwv li, yog tias y sib txawv ncaj qha li x, thiab y = 6 thaum x = 2, qhov tas li ntawm kev hloov pauv yog k = = 3. Yog li, tus kev sib npaug piav txog qhov no ncaj qha variation y = 3x.
Ntxiv mus, dab tsi yog qhov sib txawv ncaj qha sib npaug?
Kev txhais ntawm ncaj qha variation . 1: kev sib raug zoo lej ntawm ob qhov sib txawv uas tuaj yeem qhia los ntawm ib qho kev sib npaug nyob rau hauv uas ib tug variable yog sib npaug rau ib tug tas mus li lub sij hawm rau lwm yam. 2:ib kev sib npaug los yog muaj nuj nqi expressing ncaj qha variation - piv inverse kev hloov pauv.
Qhov thib ob, cov piv txwv ntawm kev hloov pauv ncaj qha yog dab tsi? Ib txhia piv txwv ntawm kev hloov pauv ncaj qha teeb meem hauv lub neej tiag tiag: Tus naj npawb ntawm cov xuab moos koj ua haujlwm thiab tus nqi ntawm koj daim tshev nyiaj. Qhov hnyav ntawm lub caij nplooj ntoos hlav thiab qhov deb ntawm lub caij nplooj ntoos hlav yuav ncab.
Piv txwv:
- qhov sib npaug sib txuas x thiab y.
- tus nqi ntawm y thaum x = 15.
- tus nqi ntawm x thaum y = 6.
Raws li, qhov sib npaug sib txawv yog dab tsi?
Hauv kev sib npaug y = mx + b, yog tias m yog qhov tsis tu ncua thiab b = 0, ces koj muaj txoj haujlwm y = mx (feem ntau sau y = kx), uas yog hu ua ncaj qha kev hloov pauv . Qhov ntawd yog, koj tuaj yeem hais tias y txawv ncaj qha li x lossis y yog ncaj qha proportional rau x.
Direct variation graph yog dab tsi?
A daim duab qhia ncaj qha variation yog tias nws mus dhau qhov keeb kwm, (0, 0). Qhov sib npaug yog y = kx, qhov twg k yog qhov tsis tu ncua, uas pom meej thaum peb sau qhov sib npaug li yx = k. Hauv daim ntawv nqes hav-intercept, qhov sib npaug yuav yog y = mx + b, qhov twg m = k, thiab b = 0.
Pom zoo:
Yuav daws qhov tsis sib npaug ntawm cov kab sib npaug thiab cov kab sib npaug sib npaug li cas?
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