To write the vertex form of a parabola, we use the equation:
\[ y = a(x - h)^2 + k \]
where \((h, k)\) is the vertex of the parabola.
Since you mentioned that the parabola is upward-opening and there is a plotted point, to provide the vertex form you would need to identify the coordinates of the vertex and the value of \(a\) which indicates how narrow or wide the parabola is.
Please provide the coordinates of the vertex or the location of the plotted point in the description, and I'll help you form the vertex equation in the correct format \(y = (x - h)^2 + k\).