A random sample of college students was surveyed about how they spend their time each week. The scatterplot below displays the relationship between the number of hours each student typically works per...

A random sample of college students was surveyed about how they spend their time each week.  The scatterplot below displays the relationship between the number of hours each student typically works per week at a part- or full-time job and the number of hours of television each student typically watches per week.  The correlation between these variables is
r
= –0.63, and the equation we would use to predict hours spent watching TV based on hours spent working is as follows:

            Predicted hours spent watching TV = 17.21 – 0.23(hours spent working)

1. Since we are using hours spent working to help us predict hours spent watching TV, we’d call hours spent working a(n) __________________ variable and hours spent watching TV a(n) __________________ variable.


2. The correlation coefficient, along with what we see in the scatterplot, tells us that the relationship between the variables has a direction that is _________________ and a strength that is ______________________.


3. According to the regression equation, we predict the number of hours spent watching TV per week to decrease by ___________________as the number of hours spent working per week increases by  ___________________.