\"point-slope

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\"\"

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First find the slope,

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\"\"

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\"\"                           (Substitute \"\")

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\"\"                              (Product of two same signs is positive)

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\"\"                                 (Add: \"\")­ 

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\"\"                                      (Divide: \"\")       \"\"

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Substitute slope and coordinates of either point in point-slope form line equation.

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\"\"          (Substitute \"\")

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\"\"                (Product of two same signs is positive) \"\"

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The point-slope form line equation is \"\".