\"slope\"\"

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The points is Y(4, \"\"), Z(5, \"\")

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Substitute \"\" in slope formula.

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\"\"

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\"\"        (Subtract: \"\")

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

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

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\"\"                            (Simplify) \"\"

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The slope of the line that passes through the points is 1.