: for now,
just take my word for it). Knowing this, say which of the
following statemants is true. <p>

a.  the rms error for the new scatter diagram is the same as 
    the rms error for the old one.  <p>

b.  the rms error for the new scatter diagram is greater than
    the rms error for the old one.  <p>

c.  the rms error for the new scatter diagram is less than   
        the rms error for the old one. <p>

d.  to know whether the rms error for the new scatter diagram
    is less than, greater than, or equal to the rms error for
    the old one you need more information about the old      
    scatter diagram or the point added to it to get the new  
    scatter diagram.