For each graph, select the best answer to the question "should we use the regression equation to predict a y-value for a given x-value?" 15 15 15 15 10 10 10 10 - V - V - v 5 5 5 5 5 10 15 5 15 5 10 15 5 10 15 1. No, we should remove the outlier, then use y to predict the next y value 2. No, we should remove the outlier first then re-calculate the regression equation 3. Yes, we can use the regression equation to predict y given x 4. No, the relationship does not appear to be linear