Level 6

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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