What's the full equation for this graph?

1.
Left side of a graph is a line that passes through points and so we can write its equation as:



2.
Right side of a graph is a parabola with vertex that passes through point . Its equation:



Substitute and to calculate parameter



and we have the equation of parabola:



From 1. and 2. full equation for graph is:

Im pretty sure it’s the first one