how to know 'y' values of points when we only know 'x' values?

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I know the coordinates of red points and slope of red line.
the black line is perpendicular to red line.
I know 'x' values(x1,x2)
but I don't know 'y' values, so I want to know 'y' values(y1,y2).
is there a fuction or a formular?
thanks

Answers (1)

AndresVar
AndresVar on 31 May 2022
yes a perpendicular line has a negative inverse slope
so if red lines has slope m1=(dy/dx)_red, then the black line has slope m2=-1/m1=(dy/dx)_black

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