The figure below shows data from a multiple linear regression analysis with the response variable, Y, and two predictors, X1 and X2. Top Left: a plot of predictor X1 (x-axis) vs response Y (y-axis). Top Right: a plot of predictor X2 (x-axis) vs (the same) response Y (y-axis). Bottom Left: a plot of predictor X1 (x-axis) vs predictor X2 (y-axis). For each of the following questions, the correct answer may be more than one of A, B, C, and D, or maybe none of them.