Chapter Seven:  Graphs and Linear Equations

Take notes on the following topics.
Algebra 1 Notes

Chapter Seven

Section 7.1

Section 7.2

Section 7.3

Section 7.4

Section 7.5

Section 7.6

Section 7.7

Section 7.8

Section 7.9

Section 7.10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



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Section 7.8     Parallel and Perpendicular Lines

(Examples provided by Prentice Hall)

Part I: Parallel Lines

Determine whether the given lines are parallel or not.

 
Example 1   y – 2 = 5x + 4   and   –15x + 3y = 9
The first line may be rewritten as y = 5x + 6. The second line may be rewritten as 3y = 15x + 9   or   y = 5x + 3. The two lines have slope 5, and they have different y-intercepts. They are parallel.

Part II: Perpendicular Lines

Determine whether the given lines are perpendicular or not.

 
Example 1   y = (1/3)x + 7   and   y = –3x – 7
The lines are perpendicular since the product of 1/3 and –3 equals 1.

 

Take class notes.

Before starting your homework, rework the examples that are illustrated in this section of your textbook and the examples that I demonstrated in class. 

Then do your homework.

Write down questions (examples or concept that you do not understand).......then.............. Ask these questions in class.