A fal taɣelit toɣadat titbaqqa tin (4,2) d (8,6) dihen edag wa s itaj axis wan x? Aliɣi ən aliɣi.
Daɣ tizarat, ilzam ti ad iddikud gradient n taɣelit s ajaraw n amutti n y fal amutti n x Daɣ awen, jir titbaqqet ta tazzarat d titbaqqet ta tis sanatat coordinate tan y tiw-ad s 6-2=4 d coordinate tan x tiw-ad s 8-4=4, daɣ awen gradient eqqal 4/4=1 Nǎmǎjrǎd s tǎssǎr s alɣisab y=x+c y-ǎlqim n c, s addobǎtǎn as ajaraw n-iyyǎd daɣ titbăqet, s almităl, 4=2+c, s-a-wen c ilzam ad eqqǎl 2 d alɣisab n tǎssǎr tǎssǎr y=x+2 Alwaq wa id taɣelit tijja fal axis wan x, coordinate tan net daɣ y aqqalan 0 Dǎɣ awen, anilkaman anilkaman dǎɣ aɣalay ən x dǎɣ x=2.