Step 1:

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(a)

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

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Find the slope $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in the slope formula.

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$\"\"$

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Slope of $\"\"$

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(b)

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

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Substitute $\"\"$ in the slope formula.

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$\"\"$

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Slope of $\"\"$

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Solution:

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Slope of $\"\"$