:1 This problem refers to diagram ? on page ? of the test.
Which of the following is correct?  
     
 	
 a.  The solid line is both the SD line and the regression   
    line.  <p>

b.  The dashed line is both the SD line and the regression
    line.  <p>

c.  The solid line is the regression line and the dashed line
    is the SD line.  <p>

d.  The dashed line is the regression line and the solid line
    is the SD line.  <p>

e.  None of the above is true.