$\"\"$

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Observe the table :

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The line passing through the points are $\"\"$ and $\"\"$ .

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$\"\"$ .

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$\"\"$ (Formula for slope)

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$\"\"$ (Substitute $\"\"$ and $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$ (Simplify)

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Therefore, the slope is $\"\"$ .

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$\"\"$

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The slope is $\"\"$ .