1. Graph the following lines on the same coordinate plane. y = 2x - 1
Bellwork
Graph the following lines on the same coordinate plane.
y = 2x - 1
y = -2x + 5

2. Graphing Systems of Equations
Lesson 3-1
3-1
Graphing Systems
Of Equations
pg 118

3. Graphing Systems of Equations
Lesson 3-1
Multiple Choice: Which ordered pair of numbers is the is the solution to the system?
A. (1,-4) B. (-6,-4) C. (-1,-3) D. (-3,-2)
x + 2y = -7
2x - 3y = 0

4. Graphing Systems of Equations
Lesson 3-1
Additional Examples
Solve the system by graphing.
Graph the equations and find the intersection.
The solution appears to be (–4, 2).
x + 3y = 2
3x + 3y = –6
Check: Show that (–4, 2) makes both equations true.
x + 3y = x + 3y = –6
(–4) + 3(2) (–4) + 3(2) –6
(–4) – –6
2 = 2 –6 = –6

5. Graphing Systems of Equations
Lesson 3-1
Additional Examples
Solve the system by graphing. Check your solution.
2x + y = 5
-x + y = 2

6. Graphing Systems of Equations
Lesson 3-1
Solve the system by graphing. Check your solution.
x = 5
y = x

7. Graphing Systems of Equations
Lesson 3-1

8. Graphing Systems of Equations
Lesson 3-1
Additional Examples
Classify the system as independent, dependent or inconsistent.
y = 3x + 2
–6x + 2y = 4
-3x + y = 4
x – 1/3y = 1

9. Lesson 3-1
Homework
pg 120