Suppose you got your first job with the DC Police Department as a data analysts.Your first assignment was to analysis a dataset on 81 drunk drivers who were arrested in the preceding month in Washington DC.You have been provided the raw data that had following variables:

 1. blood alcohol level (%)  2. age  3. weight  4. height  5. sex (male or female)  6. race (five categories of the race: W, AA, H, A, other)  7. number of prior arrests for drunk driving. 

31. If you use a regression model withbloodalcohol level as the dependent variable and ALL the other variables as the independent variables, how many predictors (x-variables) will you have in the regression model?