Parabola Standard Form

What is the axis of symmetry for the following equation? y=4x²-8x+9

• x=-8

• x=1

• x=-1

• x=2

Find the vertex of

f(x) = -x² - 4x + 12

• (-2, 16)

• (2, 0)

• (2, 4)

• (-2, 4)

What is the vertex?

• (2, 4)

• (3, -1)

• (0, 8)

• (4, 2)

What is the equation for axis of symmetry?

• y=3

• x=3

• x=5

• x=1

Find the vertex, focus, and directrix of the parabola with the given equation. 

•  vertex:  (-4, 2) focus:  (-4, 6) directrix:  y = -2

• vertex:  (4, -2) focus:  (4, 2) directrix:  y = -6

•  vertex:  (2, -4) focus:  (2, 0) directrix:  y = -8

• vertex:  (-4, 2) focus:  (-4, -2) directrix:  x = 6

How WIDE will this parabola be?

• 12

• 3

• (2,3)

• 24

Given a parabola with a vertex of (4,0) and a focus of (4,-1) write the equation of the parabola.

Mathematical Equivalence

ON

Find the vertex, focus, and directrix of the parabola with the given equation. 

• vertex:  (3, 2) focus:  (5, 2) directrix:  x = 1

•  vertex:  (-3, -2) focus:  (-1, -2) directrix:  x = -5

• vertex:  (2, 3) focus:  (4, 3) directrix:  x = 0

• vertex:  (3, 2) focus:  (1, 2) directrix:  x = 5

Given a parabola with a vertex at (4,3) and a directrix of y=1, write the equation of the parabola.

Mathematical Equivalence

ON

Since the parabola opens right, then the a-value had to be...

• positive

• negative