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Chapter 12—Graphing 125 Solving Systems of Linear Equations Some very interesting things happen when you plot two different linear equations on the same coordinate plane. The main thing is this: As long as the two lines do not have the same slope, they intersect (or cross) at some point. [show one line, two lines and point of intersection] [if lines have the same slope, they will not cross because they are parallel]
Examples & Exercises


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