Conic Sections

Question 1

Which conic section is formed when a plane intersects the central axis of a double-napped cone at a 90° angle?

Revolt · Accepted Answer

circle

Question 2

Complete the statements to describe the graph that represents the equation (y – 8) = –2(x – 2)2.

Revolt · Accepted Answer

The vertex is .: (2, 8); The directrix is y = .: 8.125; The focus is .: (2, 7.875); The focal width is .: 0.5

Question 3

–7.875–8.1257.875✔ 8.125

Revolt · Accepted Answer

8.125

Question 4

(2, –8.125)(2, –7.875)✔ (2, 7.875)(2, 8.125)

Revolt · Accepted Answer

(2, 7.875)

Question 5

0.125✔ 0.528

Revolt · Accepted Answer

0.5

Question 6

What describes θ when an ellipse is created from an intersection of a plane and double-napped cone?

Revolt · Accepted Answer

α < θ < 90⁰

Question 7

Which equation describes the circle?

Revolt · Accepted Answer

(x – 4)2 + (y + 1)2 = 25

Question 8

Which equation has a focus at (–6, 12) and directrix of x = –12?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/22684da6349508eec2eb2376783d9aa2.png

Question 9

Which equation has a center at (2, 1) and a point on the circle of (2, –3)?

Revolt · Accepted Answer

(x – 2)2 + (y – 1)2 = 16

Question 10

The vertex is .

Revolt · Accepted Answer

(2, 8); The vertex is .: (2, 8); The directrix is y = .: 8.125; The focus is .: (2, 7.875); The focal width is .: 0.5

Conic Sections Answers