Observe the figure:
\The vertex of the parabola is
and the point on the parabola is
.
The parabola opens up which means that the parabola equation is of tge form
.
Substitute the values of
in
.

To determine the remaining parameter
, substiute the values
in
.

Substiute the values in the equation
.

The parabola equation is
.
The parabola equation is
.