Hauv kev ua lej, txoj kab nqes piav qhia txog txoj kab ncaj nraim li cas. Nws yog qee zaum hu ua gradient. Kev sib npaug rau Slope. Txoj kab nqes txhais tau tias yog "hloov hauv y" dhau ntawm "hloov hauv x" ntawm kab. Yog tias koj xaiv ob lub ntsiab lus ntawm ib kab - (x1,y1) thiab (x2,y2) - koj tuaj yeem suav qhov nqes hav los ntawm kev faib y2 - y1 tshaj x2 - x1.
Ntawm no, Puas yog y-intercept y1 lossis y2? Yog tias peb paub qhov kev sib koom ua ke ntawm ob lub ntsiab lus - (x1, y1) thiab (x2, y2) - raws kab, peb tuaj yeem suav nws txoj kab nqes thiab nws y-cuam tshuam los ntawm lawv. Qhov nqes hav, m, yog kev hloov hauv y (y, lossis y2 - y1), muab faib los ntawm kev hloov hauv x (x, lossis x2 - x1).
x2 thiab x1 yog dab tsi?
Tsis tas li ntawd koj tuaj yeem qhia x1 ntawm x2 li cas?
Puas yog qhov point yog x1 thiab x2? Ib qho taw tes yog (x1, y1) thiab lwm lub ntsiab lus yog (x2, y2). Nws tsis muaj teeb meem uas yog (x1, y1) thiab qhov twg yog (x2, y2).
Luas 2 x 3y = - 15 ?
Kev faib ob qhov txiaj ntsig tsis zoo ua rau muaj txiaj ntsig zoo. Reorder 5 5 thiab 2 × 3 2 x 3 . Rewrite nyob rau hauv daim ntawv nqes hav-intercept. Siv daim ntawv nqes hav-intercept, txoj kab nqes yog 23 .
Koj nrhiav y2 li cas? Koj tuaj yeem hais tias x2 = x1 + dav. Qhov siab ua haujlwm tib yam, yog li ntawd y2 = y1 + y .
Yuav ua li cas koj xam y1 los ntawm kev nyob deb?
Koj hais li cas qhov kev ncua deb?
Thiab qhov kev ncua deb ntawm cov ntsiab lus yog dab tsi? Qhov kev ncua deb ntawm ob lub ntsiab lus yog txhais raws li qhov ntev ntawm txoj kab ncaj qha txuas cov ntsiab lus no hauv lub dav hlau tswj hwm. Qhov kev ncua deb no tsis tuaj yeem tsis zoo, yog li peb coj tus nqi meej thaum nrhiav qhov nrug ntawm ob qhov ntsiab lus muab.
Koj nrhiav y1 li cas?
Qhov kev ncua deb ntawm ob lub ntsiab lus li cas? Kawm paub yuav ua li cas thiaj nrhiav tau qhov kev ncua deb ntawm ob lub ntsiab lus los ntawm kev siv tus qauv nyob deb, uas yog ib qho kev siv ntawm Pythagorean theorem. Peb tuaj yeem rov sau dua Pythagorean theorem li d=√((x_2-x_1)²+(y_2-y_1)²) txhawm rau nrhiav qhov kev ncua deb ntawm ob lub ntsiab lus.
y1 yog dab tsi hauv point-slope form?
Dab tsi yog txoj kab nqes hav uas hla cov ntsiab lus (- 5'4 thiab 3 2?
Qhov nqes hav yog 4 .
Koj ua li cas 3x4y8? xai
- 3x – 4y = 8. 3x – 4y = 8. Ntxiv 4y rau ob sab. Ntxiv 4y rau ob sab.
- 3x = 8 + 4y. 3x = 8 + 4y. Qhov sib npaug yog nyob rau hauv cov qauv. Qhov sib npaug yog nyob rau hauv cov qauv.
- 3x = 4x + 8. 3x = 4x + 8. Faib ob sab los ntawm 3. Faib ob sab los ntawm 3.
- frac{3x}{3}=frac{4y+8}{3} 33x=34y+8 Sib faib los ntawm 3 undoes qhov sib npaug ntawm 3.
2 x 3y yog dab tsi hauv daim ntawv nqes hav-intercept? Summary : Daim ntawv nqes hav-intercept of linear equation 2x + 3y = 6 yog muab los ntawm y = (-2/3)x + 2.
Dab tsi yog qhov gradient ntawm Y 4x 8?
y = 4x – 8 4.
Puas yog qhov twg yog x1 thiab x2? Ib qho taw tes yog (x1, y1) thiab lwm qhov taw tes yog (x2, y2). Tsis muaj teeb meem qhov twg yog (x1, y1) thiab uas yog (x2, y2).
Dab tsi yog x1 thiab x2 hauv kev txheeb cais?
xi sawv cev rau tus nqi ith ntawm qhov sib txawv X. Rau cov ntaub ntawv, x1x 21,x2 ;42 ,ua. … Rau cov ntaub ntawv, Σxi = 21 + 42 +… + 52 = 290.
Qhov kev ncua deb ntawm ob lub ntsiab lus x1 y1 thiab x2 y2 yog dab tsi? Qhov deb ntawm ob lub ntsiab lus P(x1,y1) thiab Q(x2,y2) yog muab los ntawm: d(P,Q) = √(x2 - x1)2 + (y2 - y1)2 { Distance formula} 2. Qhov deb ntawm ib qho point P(x, y) los ntawm lub hauv paus chiv keeb yog muab los ntawm d(0,P) = √ x2 + y2. 3. Kev sib npaug ntawm x-axis yog y = 0 4.
Koj pom qhov kev ncua deb ntawm x1 y1 thiab x2 y2 li cas?
Qhov kev ncua deb yog √[(x2-x1)²+(y2-y1)²]. Koj tuaj yeem xav tias nws yog qhov txuas ntxiv ntawm Pythagorean theorem!
Qhov kev ncua deb ntawm cov ntsiab lus f 3/4 thiab H 6 8 yog dab tsi? Qhov kev ncua deb ntawm cov ntsiab lus yog 29 los yog 5.385 sib npaug mus rau qhov ze tshaj txhiab.