$\"\"$

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Substitute $\"\"$ in rate of change formula.

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$\"\"$

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

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

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

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$\"\"$ (Cancel common terms) $\"\"$

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The rate of change represented in the graph is $\"\"$ .

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