2.3 Quiz - Focus & Directrix

In a parabola, where is the vertex located?

• (a, b)

• (x, y)

• (m, n)

• (h, k)

What is the vertex of this parabola?

• (−1, 3)
• (−3, 11)
• (−2, 5)
• (0, 5)

A parabola has a vertex at (-3,2).
Where is the axis of symmetry?

• y = -2
• x = 3
• x = -3
• y = 2

• Up

• Down

• Right

• Left

Does y = -4x² have a maximum or minimum value?

• maximum
• minimum

The focus is a _____ that always lies _______ your parabola.

The directrix is a _______ that always lies ________ your parabola.

What is the relationship between the focus and directrix in a parabola?

• The focus is equidistant from the directrix and the vertex of the parabola.

• The focus is closer to the directrix than the vertex of the parabola.

• The focus is farther from the directrix than the vertex of the parabola.

• The focus is located on the directrix of the parabola.

The vertex, (h, k), is halfway between the focus and the directrix.

• true
• false

The directrix is _____ units away from the vertex.

• 2

• 5

• 3

• 6