Lessons on Conics Parabola

What is the vertex of the parabola: y=2(x-3)²+4

• (3,4)
• (-3,4)
• (3, -4)
• (-3,-4)

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

What direction does the parabola point?

• Up 
• Down
• Left 
• Right

y = -8(x+1)²-2
What direction does this parabola open?

• up
• down
• left
• right

Tags

CCSS.HSF-IF.C.7A

x= 1/4(y-5)²-2
What are the coordinates for the focus?

• (1,5)
• (2,6)
• (-2,5)
• (-1,5)

y=-2(x+3)^2-6
What is the equation of the directrix?

• x = 47/8
• x = -47/8
• y = 47/8
• y = -47/8

The focus is at (-8,-39/4) and the vertex is at (-8,-10).  What is the equation of the parabola?

• y=(x+8)²-10
• y=(x+11)²+7
• y=-(x+8)²-10
• y=(-x+11)²-10