Respuesta :

ghanami

Hello : let  A(1,-5)    B(-3,7)
the slope is :   (YB - YA)/(XB -XA)
(7+5)/(-3-1)  = -3
an equation is : y=ax+b     a is a slope

y = -3x +b

 

the line through point  (1,-5) :  -5 = (-3)(1)+b
b =-2
the equation is : y =-3x-2

or : 3x+y= -2

hezezhou93
answer is y=3x-8
(7-(-5))divide(1-(-3))=3         3 mean slope

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