class: center, middle, inverse, title-slide .title[ # Regression with interactions review ] .subtitle[ ## EDS 222 ] .author[ ### Max Czapanskiy ] .date[ ### Fall 2024 ] --- <style type="text/css"> .remark-slide-content { font-size: 16px; padding: 1em 4em 1em 4em; } </style> # Interactions: review Recall the equation for a regression with two predictors and their interaction. $$ \hat y = \hat \beta_0 + \hat \beta_1 x_1 + \hat \beta_2 x_2 + \hat \beta_3 x_1 x_2 $$ In the following four figures, determine the signs of the four `\(\hat \beta\)`s. <img src="data:image/png;base64,#/Users/frank/Documents/GitHub/teaching/eds-222-statistics.github.io/docs/course-materials/slides/week4/week4b-slides_files/figure-html/unnamed-chunk-1-1.svg" height="450px" style="display: block; margin: auto;" /> ---