Level 6
Level 7

Unit 7


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Model
To represent a situation with equations
Solution
An ordered pair [ex., (x, y)] that satisfies all equations in a linear system
Point of Intersection
The co-ordinate (x, y) where the graphs of each equation in a linear system intersect
Graphically
To find a solution using a graph
Substitution
To find a solution by substituting values
Elimination
To find a solution by eliminating some variables
Coincident lines
When two lines/line segments have an infinite number of solutions (are the same)
Equivalent linear systems
Manipulating one of the two equations so some variables are equivalent