MATH 134 Problem Set 3 Grading Instructions
  
  Section 6.4/
  
     4 -- 4 points (2 for always increasing, 2 for correct concavities)
    12 -- 4 points
    16 -- 2 points
    18 -- 2 points (-1 if they forget the sign from switch of limits)
    21 -- 8 points (2 each part)
    
   Section 7.1 ("u-substitution" problems)/
   
     2 -- 6 points (2 for a, 4 for b, but don't take off if they only
                    answer the ``general'' i.e with + C)
     
     6,10,12,18,20,24,28,33,38 -- 2 points each (1 for correct u, 1 
                                                 for integral)
     
     55,60 -- 3 points each (like 6, etc, but now one more point 
                             for value using FTC)
                             
     83 -- 6 points (2 each part; anything like ``they differ by 
                     a constant'' is OK for c)
                   
     89 -- 4 points
     
   Total:  60 points