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x1 y1 x2 y2
formula de pendiente
m= y2-y1
_____
x2-x1
m= -1/4 - 5
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-2/3 + 2 (porque - por -2= +2)
m= 21/4
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7/3
m= 9/4
A (-1/2 , 3/4)
x1 y1
ecuacion de la recta
(y-y1)=m(x-x1)
y-3/4=9/4 (x+1/2)
4 (y-3/4)=9 (x+1/2) (se multiplica cruzado)
4y-3=9x+9/2
4y-9x-3-9/2=0 (se iguala a 0)
4y-9x-15/2=0