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ALG I LAP 9
Systems of Equations
| Question | Answer |
|---|---|
| 3 methods to solve a system of equations | graphing, substitution, addition/subtraction (or elimination) |
| system of equations | two or more linear equations |
| solution set for coinciding lines (same slope, same y-intercepts) | infinitely many solutions |
| solution set for parallel lines (same slope, different y-intercepts) | no solution |
| solution set for intersecting lines (different slopes) | ordered pair for point of intersection |
| open half-plane | region of a plane which does not include the boundary line |
| closed half-plane | region of a plane which does include the boundary line |
| boundary line | the inequality graphed as a solid or dashed line |
| dashed boundary line | inequality is either < or > |