+

# Topic 4-5 Writing Equations of Parallel and Perpendicular Lines

##### Rating:
(2)
• (1)
• (1)
• (0)
• (0)
• (0)
Author: Mary Selcer

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

No credit card required

28 Sophia partners guarantee credit transfer.

281 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 25 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial

## Unit 4 Concept 5 Writing equations of Parallel and Perpendicular

Watch the video closely.  This concept is a review of algebra 1.  We are writing equations of lines that are parallel and perpendicular to a line you are given.  Read the steps below first before watching the video.

1.  First, I solve the given equation for "Y" if it is not in slope intercept form so I can find the slope

2.  Second, I find the needed slope.    Parallel---same slope    Perpendicular----opposite flipped

3. Third,   Use the slope I need and the point I am given to plug into  y = mx + b and SOLVE FOR "b"

4.  Finally write your new equation with you new slope and new b.

## Topic 4-5 Writing the Equation of Parallel and Perpendicular Lines

Source: Created by Mary Selcer