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 7.9     Proofs

(Examples provided by Prentice Hall)

Part I: Proofs

Complete the proof.

 
Example 1   Prove that the graph of an equation of the form x/a + b/y + 1 crosses the x-axis at (a, 0) and crosses the y-axis at (0, b).
bx + ay = ab and ay = –bx + ab
y = (-b/a)x + b
The y-intercept is b; therefore, the line crosses the y-axis at the point (0, b).
Set y = 0, giving x = a. The line crosses the x-axis at (a, 0).

 

 

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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.