\"slope\"\"

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Since y-coordinates are same it is a horiontal line and slope is zero.

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Let\\\\'s check the solution by substituting \"\" in slope formula.

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\"\"

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

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

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

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The slope of the line that passes through the points is zero.