what is the purpose of rpart in a cart model? how to estimate meaningful predictors in a rpart predicting the importance of x variables which is the only important variable for a prediction? what is determining which variable is important for predicting which of the following variables? which variable is used as the only important predictor of a variable? what is the only important variable in the r part for predicting x which of the following variables are used for predicting the outcome? what is the predicting variable x1 what kind of variables are used in carrot what variable is used for predicting the outcome in a carrot calculating meaningful predictors in cars what predicting variable is used in chart what is the important predictor for predicting a particular outcome in r which variable is useful in predicting one of the y variables? what is the important variable of the dart model which x1 predictor is useful in a carrot model? which is an important variable in r which variable is a predictor for which of the y variables? which rpart variable can be used to predict a prediction of one of the y variables?