Lessons on Conics Parabola

The focus is always inside the parabola.

• true
• false

A parabola is the set of all points equidistant from the focus and the directrix.

• true
• false

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

• true
• false

True or False?
When the x-part is squared, the parabola opens up or down.

• True
• False

In parabola definition " the fixed point" is called :

• Directrix

• Eccentricity

• Focus

• Parabola

Tags

CCSS.HSG.GPE.A.2

In parabola definition " the fixed line" is called :

• Directrix

• Eccentricity

• Focus

• Parabola

Tags

CCSS.HSG.GPE.A.2

The focus of a parabola is F(-2, 0) and its vertex is at

the origin. Find the equation of the directrix.

• x=2

• x=-2

• x=4

• x=5

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

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

• (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)