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x= -1 y= 2
y-y1 = m ( x- x1 )
y-2 = 2 ( x -(-1)
y = 2x + 1 + 2
y = 2x + 3
m1.m2 = -1/-3
= 1/3
y-y1=m(x-x1)
y-2=1/3(x-(-1))
y-2=1/3x+1/3
y. = 1/3+1/3+2
y. = 1/3+2/3