Bell Work:
1. Graph 3x + 5y = 20.
2. What is the x-intercept of the graph?
3. Where does the graph intersect the
horizontal line y = 1?
6.1 Graphing Systems of Equations
Two or more equations form a system of
equations.
The solutions are the (x, y) values that make
both of the equations true.
Solve by Graphing
- Graph two lines and see where they
intersect.
- What are our options?
Example #1
Write a system of equations that has a solution
of (0,3).
Write a system of equations that has no
solution.
Example #2: Solve by graphing
y = -3x + 10
y=x–2
Example #3: Solve by graphing
2x – y = -1
4x – 2y = 6
Example #4
Joe and Josh want to buy a video game.
Joe has $14 and saves $10 per week.
Josh has $26 and saves $7 per week. In
how many weeks will they have the
same amount saved?
Homework:
6.1 (pg. 339) #26,34,35,36,40,42
(focus on neat and precise graphs)