AnswersCollege Prep Math B - IC26Conic Sections: Parabolas

Conic Sections: Parabolas — Test Answers

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21
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Which is the axis of symmetry of a parabola with equation ?

Question illustration
A
x = –4
B
x = –1
C
x = 0
D
x = 1
22
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A parabola has a vertex at (0,0). The equation for the directrix of the parabola is x = –4.

A
up
B
down
C
right
D
left
23

Which equation represents a circle with a center at (–3, –5) and a radius of 6 units?

A
(x – 3)2 + (y – 5)2 = 6
B
(x – 3)2 + (y – 5)2 = 36
C
(x + 3)2 + (y + 5)2 = 6
D
(x + 3)2 + (y + 5)2 = 36
24

A parabola is represented by the equation x2 = 4y.

A
(0,4)
B
(0,1)
C
(1,0)
D
(4,0)
25

Yung is designing a flashlight that uses a parabolic reflecting mirror and a light source. The shape of the mirror can be modeled by , where x and y are measured in inches. What is the focus point of the flashlight?

Question illustration
A
(–2, 0)
B
(0, –2)
C
(0, 2)
D
(2, 0)

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Conic Sections: Parabolas

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