All your parabolas have the same basic bullet-shape contour that seems to be backwards. I can see you took great care to follow the coordinates precisely on this last one but a true parabola only lines up when mirrored and angled 45*. I don’t think it’s a coincidence and I can’t shake the idea that something is missing or needs to be added to the equation.
Doesn’t follow a parabola’s contour and where it doe’s is just a short section.

Follows the contour accurately for the whole length.
