9-1 Part 1: Parabolas

The focus is always inside the parabola.

• true
• false

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

• true
• false

All parabolas with a vertical directrix open the left or right. #2

• true

• false

Find the focus of the parabola whose vertex is at the origin and whose directrix is x = 5. #23

• (5,0)

• (-5,0)

• (0,2)

• (0,-2)

Find the focus of the parabola whose vertex is at the origin and whose directrix is x = -4.

• (3,0)

• (4,0)

• (-4,0)

• (-3,2)

What is the standard form of the equation of the parabola with Focus: (0, 7) and the vertex at the origin?

If a parabola has a focus at (0,3) and a vertex at the origin...what is the equation of the directrix?

• y=3

• y=-3

• x=3

• x=-3

Find the standard form of the equation of the parabola whose focus (0, 6) and a directrix y=-6.

• y = (1/24)x²

• y² = 24x

• y² = 4x

• y = (1/4)x²

The focus of a parabola is F(0, 4) and its vertex is at

the origin. Find the equation of the directrix.

• y=4

• y=-4

• y=2

• y=3

• Parabola

• Circle

• Ellipse

• Hyperbola