Intro to Parabolas

What is the point inside the parabola 'p' units from the vertex?

• vertex
• focus
• directrix
• axis of symmetry

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

• True
• False

What is the directrix of the parabolic conic section 8(y + 3) = (x - 4)²?

• y = - 3
• x= 5
• y= - 5
• y= 2

2(x + 3) = (y  - 1)²

• Parabola Opens Up
• Parabola Opens Down
• Parabola Opens Right
• Parabola Opens Left

The vertex is sometimes halfway between the focus and directrix.

• 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

What is the vertex of the parabola:
-40(x+4) = (y-9)² 

• (-4,-9)
• (4,-9)
• (-4,9)
• (4,9)

What direction does the parabola open?
-40(x+4) = (y-9)² 

• Up
• Down
• Left
• Right

What is p in the equation:
-40(x+4) = (y-9)² 

• p = - 10
• p = 10
• p = -40
• p = 40