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Solving linear systems graphically
We already know that we can represent the set of all x-y pairs that satisfy a linear equation as a line. If there is a point where two of these lines intersect, then the x-y pair corresponding to that point must satisfy both equations.
Common Core Standards: 8.EE.C.8, 8.EE.C.8a
Solving Linear Systems by Graphing
Testing a solution for a system of equations
Graphing Systems of Equations
Graphical Systems Application Problem
Solving systems by graphing 3
Some practice solving systems graphically (exercises available at http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/graphing_systems_of_equations )
Graph a system of equations in slope-intercept or standard form