\"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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\"\"                              (Subtract: \"\")­­

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\"\"                                (Calcel common terms)­­

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\"\"

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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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\"\"

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