find the slope of a line perpendicular to each given line? Heres the question: y=x-1

I do know the formula and i dont known how to solve it. The problem is y=x-1.
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1 Answer

y=x-1, slope=1 (45 deg)

perpendikular line...slope1 =-1/slope1

=-1

thus, y=-x is 90 deg tu y=+x....slope=-45 deg
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