Question

Sa se determine ecuatia dreptei care contine punctele A( 1, -2) B( -3, 5 )

Answer 1

AB: (y-yb)/(ya-yb)=(x-xb)/(xa-xb)
(y-5)/(-2-5)=(x-(-3))/(1-(-3))
y-5)/(-7)=(x+3)/4
y-5=-7/4*(x+3)
y=-7x/4-21/4+5
y=- 7x/4-1/4