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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
Sal checks whether (-1,7) is a solution of the system: x+2y=13 and 3x-y=-11.
Graphing Systems of Equations
Graphical Systems Application Problem
Sal is given three lines on the coordinate plane, and identifies one system of two lines that has a single solution, and one system that has no solution.
Solving systems by graphing 3
Sal graphs the following system of equations and solves it by looking for the intersection point: y=7/5x-5 and y=3/5x-1.
Graph a system of equations in slope-intercept or standard form, and find their solution using the graphs.