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Answer:
[tex]-\frac{6}{7}[/tex]
Step-by-step explanation:
⇒ [tex]m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}[/tex]
⇒ [tex]m = \frac{9 - 3}{1 - 8}[/tex]
⇒ [tex]m = \frac{6}{-7}[/tex]