Thursday: Announcements

Thursday: Announcements

• Test corrections must be complete by tomorrow morning (Friday)

• Retest Monday– 7:40am or 4:00pm

• Extra Credit DUE Monday

• 1st Unit 8 Quiz is Tuesday

Yesterday’s Meetings

• Discussed Make-up work from Absences, Field Trips, etc

• Some students not making up work.

• District Policy (One Day + 1) for missed instruction. Makeup work always in the Green Folders, plus on Calendar!

• Scheduling Recommendations for next year!! Please come talk with me about the choices. Scheduling process starts next week!

Possible Classes

Algebra Skills

• PreCalculus– 1st Semester Algebra

– 2nd Semester Trig

• Independent Math Studies

Statistics/Data Analysis

• AP Statistics– PAP/AP English

Advanced Quantitative Reasoning (AQR)

Yesterday’s Meetings

• Cell Phones/Headphones: None out after bell rings. Not even on your desk or lap.

30 Minute Detention

if OUT after the bell

RINGS!

Section 9-2

Vertical Parabolas

Pages 620-625

Objectives• You should be able to find graph vertical

parabolas including:a. Vertex Pointb. Axis of Symmetry (AOS)c. Focus Pointd. Directrix Linee. Length of Latus Rectum (LR)

• Complete the Square to obtain vertex Format

What is a conic section?

• A conic is simply the intersection of a plane and a double-cone.

• 4 common conics are the parabola, circle, ellipse, and hyperbola shown below:

Conical View

Parabola

• A parabola is a set of points in a plane that are all the same distance from a given point called the focus and the same distance from a line called the directrix.

• A parabola is formed when we slice through one end of a double cone an an angle.

Parabola

• A parabola is a set of points in a plane that are all the same distance from a fixed line called the directrix and a fixed point not on the line called the focus .

Key Concept

• The distance from Vertex Point to Focus Point is “p”

• This is also the same distance from Vertex Point to the Directrix Line

ap

4

1

Vocabulary

• The perpendicular chord to the AOS is called the latus rectum(LR)

Latus rectum

1LR

a

When graphing you MUST label…

• vertex

• focus

• directrix

• axis of symmetry

• endpoints of the latus rectum

Where to find them…• FOCUS: inside the parabola

• DIRECTRIX: outside of the parabola

• AOS: through the vertex, perpendicular to the directrix

• FOCAL CHORD (latus rectum): inside of the parabola

Examples

• Graph and find equation examples done in packet of notes together in class.

Homework

• Finish examples in Packet of notes

• WS 8-3 Vertical Parabolas