- Substitution
- Elimination
- Graphing
- Multiple choice
- Word Problems
- 100 points

# Author Archives: sdemasi

# Info About Systems

- Intersecting Lines
- Different slopes
- The lines intersect at exactly one point. The point is the solution.
- The system is consistent & independent

- Parallel Lines
- Same slope, different y-intercept
- The lines NEVER intersect. There is NO SOLUTION.
- The system is inconsistent

- Coincident Lines
- Same slope, same y-intercept
- The lines intersect at EVERY point. The solution is ALL REAL NUMBERS ON THE LINE.
- The system is consistent & dependent

- Substitution/Elimination
- If you solve an equation and get a value for x or y you MUST find the corresponding value. This means the lines are intersecting
- If you solve the equation and get a contradiction there is no solution. This means the lines are parallel
- If you solve the equation and get an identity the solution is all real numbers on the line. This means the lines are coincident.
- You cannot use elimination unless you have a pair of opposites (2x and -2x). If you do not have a pair of opposites you need to create them by multiplying the entire equation by a number

# Clean out your Math Folder!

EYou only need to have the following items in your math folder:

- Class info sheet from the first day of school
- Current packet which is Unit 3 Part 2 – Systems of Equations

Please leave everything else at home in a separate folder or binder

# Expectations for the Transformation Unit

- All graphing MUST be done in PENCIL!
- Use a RULER/STRAIGHT EDGE when drawing lines
- Once we start Transformations it is your responsibility to MEMORIZE the rules. They will NOT be given to you on a test or quiz.
- Look at each day’s lesson when you do your HW, seeing things in color will help!