# Patterns in linear regression models

What pattern would you need to decide that the linear regression model is appropriate? What would you do if you found a curvilinear pattern or no pattern at all? Discuss how to calculate the best-fitting line in a scatter plot (regression analysis).

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#### Solution Preview

What pattern would you need to decide that the linear regression model is appropriate？

When we graph the response variable vs the predictor, if we see the pattern is random, we suggest that the model is appropriate.

What would you do if you found a curvilinear pattern or ...

#### Solution Summary

The solution gives detailed discussion on the method to check appropriate linear regression model and the steps to calculate the best-fitting line.

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