html5-img
1 / 9

(Day 3) 3.4 Parallel & Perpendicular Lines (and Finding k)

(Day 3) 3.4 Parallel & Perpendicular Lines (and Finding k). Don’t need graph paper. Parallel & Perpendicular Lines. Two lines are Parallel  slopes are = Two lines are Perpendicular  negative reciprocal slopes What is neg. recip of 3? What is neg. recip of ?.

duard
Download Presentation

(Day 3) 3.4 Parallel & Perpendicular Lines (and Finding k)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. (Day 3)3.4 Parallel & Perpendicular Lines (and Finding k) Don’t need graph paper

  2. Parallel & Perpendicular Lines Two lines are Parallel  slopes are = Two lines are Perpendicular  negative reciprocal slopes What is neg. recip of 3? What is neg. recip of ?

  3. Ex 1) Find an eqtn in SF for line through point (–1, 2) that is a) parallel to and b) perpendicular to the line: x – 3y = –2 Find the slope of the line: A = 1 B = –3 a) Parallel line  same slope Use slope formula with (–1, 2) & m = :

  4. Ex 1) Find an eqtn in SF for line through point (–1, 2) that is b) perpendicular to the line  neg. recip. slope Neg. recip. slope? Use slope formula with (–1, 2) & m = –3 –3

  5. Ex 2) Find an eqtn in SF for the line having x-int –4 and parallel to y-axis Make a sketch: x-int  crosses x-axis at –4 Parallel to y-axis All of the x-coord = –4 Eqtn: x = –4 check it out: (–4, 6) (–4, 0) (–4, –5)

  6. TWAP!!! • Find an equation in Standard Form of y = 3x + 4 and goes through (0, 1) that is: • A) Parallel and B)Perpendicular to the line

  7. Find the value of k so that the line has slope m Ex 6x + ky = 10, m = –2 A = 6 B = k (k) (k)( )

  8. Find the value of k so that the line has slope m Ex ) (k, k + 1), (3, 2) , m = 3 don’t forget ( )

  9. HW # 4 Pg. 121 #31 – 45 odd and 46 • And Pg. 116 #39-45 odd

More Related