What, exactly, is the intersection point of y= -x+ 1 and x= 2b? Does it satisfy the equation y= m(x- 2b)+ (1- 2b)? And is that "for some m" or "for all m"?
What, exactly, is the intersection point of y= -x+ 1 and x= 2b? Does it satisfy the equation y= m(x- 2b)+ (1- 2b)? And is that "for some m" or "for all m"?