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

Answer 1

Given the vertex of (0,0) and the focus sitting above it on the y axis, we can assume the parabola will be opening up.  

In general, if given the focus a good way to remember the direction the parabola is the opening we can use the following phrase:  A parabola will "hug" the focus and "run away" from the directrix.  In other words, the parabola will wrap around the focus.  

Hope this is helpful.. let me know if you have questions.

Answer 2

The focus is directly above the vertex, so the parabola opens up.

In which direction the parabola opens?

So we know that the vertex is at (0, 0) and that the focus is on the y-axis.

Here you just need to remember that when we step at the vertex, the focus must be on the same line of symmetry that divides the parabola, and it also tells us in which direction the parabola opens.

Here, the focus is above the vertex, meaning that the parabola opens upwards.

So the correct option is up.

If you want to learn more about parabolas, you can read:

https://brainly.com/question/1480401