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Please see the attached Excel file.

I have a sample of 70 data pairs. The correlation between X and Y is -0.68. The OLS regression coefficient is statistically significant as shown in the file. However, with a R^2 of 0.40, I am not sure if my model would be good enough to forecast Y.

Can you please take a look?

Thanks.

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# Is this a good forecasting model?

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