You should review quiz#1 and quiz#2 but in particular you should review the following:
Try the problems discussed in the midterm review class. Check this link for solutions. FPP 5.2 and 5.5 may also help. In addition you can review the following.
Try the problems discussed in the midterm review class. Check this link for solutions. Here is another problem (not discussed in class) and the solution. FPP 7 should be reviewed if you have trouble with graphs and the notion of slope and intercept. FPP 11.1, 11.2, 11.4, 11.5 and FPP 12; pp202-207 may also help. In addition you can review the following.
Note:It is important to know the interpretation of the R-square value and how to derive the correlation coefficient r from R-square. You should know how to interpret a correlation coefficient, how to interpret the slope of a regression line and how to interpret the intercept.