mods please move this topic if this is not in the correct section. thanks. :) the question is: the vertices of the family of parabolas y = x^2 + bx, b is constant, lie on a single parabola. Find equation for that parabola. my teacher require me to provide supporting details & background info that back up my answer and have to verify it using a different method. i'm really puzzled and i would greatly appreciate any help that comes my way. thanks in advance.