Respuesta :

Hi there!  

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I believe your answer is:  

m = -3  

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Here’s why:  

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[tex]m = \frac{\text{Change in Y}}{\text{Change in X}} = \frac{-1-2}{2-1} = \frac{-3}{1}=\boxed{-3}[/tex]

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Hope this helps you. I apologize if it’s incorrect.