Respuesta :

[tex]\bf \qquad \textit{parabola vertex form}\\\\ \begin{array}{llll} {y=(x-{{ h}})^2+{{ k}}}\\\\ \end{array} \qquad\qquad vertex\ ({{ h}},{{ k}})[/tex]

notice your vertex there, 1, -3
h = 1
k = -3