What is the form of the ols regression equation? What is the ols line? How do you conduct hypothesis tests while doing regression analysis?

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Political Science 138 Final Exam Study Guide Bivariate relationships  What is the form of the OLS regression equation? Simple bivariate model: Y=alpha + betaX + epsilon. Alpha is Y intercept, beta is the slope of the line, and epsilon is the measurement of error (leftover). Multivariate model: Y= alpha +beta1 X1 + beta2 X2…. = epsilon. This equation estimates the unknown parameters in a linear regression model by minimizing the sum of the squares of differences between observed responses.  What is the OLS line? How is it the ‘best fit’ line? The line that goes through the data points on the graph at a 1unit change  How do you conduct