Question

a parabola has a vertex at (0,0). the focus of the parabola is located on the positive y - axis. in which direction must the parabola open? up down left right

Explanation:

Step1: Recall parabola - focus relationship

For a parabola with vertex at the origin $(0,0)$, if the focus is on the positive $y$-axis, the parabola opens towards the focus.

Answer:

up