Parabolas

Other

2 plays

18 questions

Nathan Rocero

•about 5 years ago

Question 1

Multiple Choice

10 points

The focus is always inside the parabola.

TRUE

FALSE

Question 2

Multiple Choice

10 points

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

TRUE

FALSE

Question 3

Multiple Choice

10 points

When x is squared, the parabola opens up or down.

TRUE

FALSE

Question 4

Multiple Choice

10 points

(y-4)^2 = -8(x+1) What are the coordinates for the focus?

(1,4)

(-1,2)

(-1,6)

(-3,4)

Question 5

Multiple Choice

10 points

Which direction does this parabola open? (y + 1)^2 = -4(x-2)

Left

Down

Right

Question 6

Multiple Choice

10 points

The vertex is halfway between the focus and directrix.

TRUE

FALSE

Question 7

Multiple Choice

10 points

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

A.TRUE

B.FALSE

Question 8

Multiple Choice

10 points

The axis of symmetry is a line that goes through the...

A.y-intercept

B.vertex

C.any random point

D.x-axis or y-axis

Question 9

Multiple Choice

10 points

What is the green dashed line called?

A.roots or x-intercepts

B.axis of symmetry

C.parabola

D.line of dashes

Question 10

Multiple Choice

10 points

If the focus of a parabola is (0, –3) and its directrix is y = 3, then its equation is

A.x^2 = –12y

B.y^2= 12 x

C.x^2 = 12y

D.y^2= -12 x

Question 11

Multiple Choice

10 points

What is the focus of this parabola? y^2=2x

A.(2,0)

B.(-2,0)

C.(0,2)

D.(0,-2)

Question 12

Multiple Choice

10 points

What is the directrix of this parabola? y^2=-1/4 x

A.x = -16

B.x = 16

C.y = 16

D.y = -16

Question 13

Multiple Choice

10 points

What is the equation of this parabola?

A.x^2 = -3y

B.x^2 = -12y

C.y^2 = 12x

D.y^2 = 3x

Question 14

Multiple Choice

10 points

What is the equation of this parabola?

A.x^2 = 4y

B.x^2 = -y

C.y^2 = x

D.y^2 = -16x

Question 15

Multiple Choice

10 points

What is the directrix of this parabola?

A.x = -3

B.x = 3

C.y = -3

D.y = 3

Question 16

Multiple Choice

10 points

The focus of a parabola is F(-2, 0) and its vertex is at the origin. Find the equation of the directrix.

A.x=2

B.x=4

C.x=-2

D.x=5

Question 17

Multiple Choice

10 points

The focus of a parabola is F(0, 4) and its vertex is at the origin. Find the equation of the directrix.

A.y=4

B.y=-4

C.y=2

D.y=3

Question 18

Multiple Choice

10 points

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

A.(3,0)

B.(-4,0)

C.(4,0)

D.(-3,2)