Jesse S. answered • 09/24/17

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(1,-2) (2.-1)

slope of line = (-1- (-2) )/2-1 = -1+2 /1 =1/1 =1

slope intercept form of equation is

y=mx + b

(1.-2)=(x.y)

-2 = 1(1) +b

b=-3

y = x -3