r feature  
epsilon  `\({\epsilon}\)` = error  

Remember that in multivariate regression, there is more than one `\(x\)` variable. 

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# Ordinary least squares example

[Ordinary least squares (OLS)](https://en.wikipedia.org/wiki/Ordinary_least_squares) regression is the simplest use case when the target `\(y\)` variable is continuous. OLS computes a best fit line that minimizes the vertical squared and summed distances from each point to calculate the model's goodness of fit. This workshop's example wi