 
 
question:
1.What percentage of variability in EdCollege is explained by its linear 
regression on SmokeEveryday?
Is that -0.636????   
I don't understand what does this question mean ??
2.Which is the dependent variable and which is the independent variable?
Dependent: Edcoloege
Independent: Smokeeveryday
3.Comment on whether the choice of dependent and independent variables is 
appropriate
because 0.636 is kind of large, so it is OK.
THank you so much