\"\"

\

Substitute \"\" in slope formula.

\

\"\"

\

\"\"

\

\"\"

\

Multiply each side by negative 4.

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\"\"

\

\"\"

\

\"\"

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Subtract 3 from each side.

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\"\"

\

\"\"

\

Multiply each side by negative one.

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\"\"

\

\"\"

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\"\"

\

The value of r is \"\"17.