Exam 1 Graded
Student
Vincent Olivieri
Total Points
92. pts
Question 1
1a pts
+ 10 pts Correct and work shown
− 0.5 pts Answer provided as vector-valued function rather than parametric equations
+ 9 pts Correct except for minor arithmetic mistake
+ 8 pts Initial point and direction vector apparently swapped
+ 7 pts Parametric equations define an incorrect line but with parallel direction
+ 6 pts Parametric equations define a line with incorrect direction, but with initial point on the correct line
+ 5 pts Parametric equations define a line, but incorrect direction and initial point
+ 3 pts Some parametric equations given, but which do not define a line
+ 4 pts Direction vector found, but not used in parametric equations
+ 0 pts Blank or totally incorrect
+ 0 pts Correct answer with no/insufficient work shown, or otherwise suspicious submission
, Question 2
1b pts
+ 10 pts Correct
+ 9 pts Minor arithmetic mistake, correct otherwise
+ 8 pts Mistake in cross product formula, but correct otherwise
+ 7 pts Equation of parallel but incorrect plane is given
+ 6 pts Parallel vector used as a normal vector in plane eqn centered at either P, Q or (0,0,0).
+ 5 pts Some other vector is used as a normal vector in plane eqn centered at either P, Q or (0,0,0).
+ 4 pts Cross product applied with two parallel vectors but no plane equation given
+ 3 pts Eqn of some plane is given, with normal vector incorrect and not parallel to correct plane, and not
centered at either P, Q or (0,0,0)
+ 3 pts Attempt to use cross product, but applied to incorrect vectors and no plane equation given
+ 2 pts Some minimal relevant work, but nothing correct
+ 0 pts Blank or totally incorrect
+ 0 pts Correct answer with no/insufficient work shown, or otherwise suspicious submission
+ 6 pts Arithmetic mistake in cross product, and malformed point-normal equation of plane.
Student
Vincent Olivieri
Total Points
92. pts
Question 1
1a pts
+ 10 pts Correct and work shown
− 0.5 pts Answer provided as vector-valued function rather than parametric equations
+ 9 pts Correct except for minor arithmetic mistake
+ 8 pts Initial point and direction vector apparently swapped
+ 7 pts Parametric equations define an incorrect line but with parallel direction
+ 6 pts Parametric equations define a line with incorrect direction, but with initial point on the correct line
+ 5 pts Parametric equations define a line, but incorrect direction and initial point
+ 3 pts Some parametric equations given, but which do not define a line
+ 4 pts Direction vector found, but not used in parametric equations
+ 0 pts Blank or totally incorrect
+ 0 pts Correct answer with no/insufficient work shown, or otherwise suspicious submission
, Question 2
1b pts
+ 10 pts Correct
+ 9 pts Minor arithmetic mistake, correct otherwise
+ 8 pts Mistake in cross product formula, but correct otherwise
+ 7 pts Equation of parallel but incorrect plane is given
+ 6 pts Parallel vector used as a normal vector in plane eqn centered at either P, Q or (0,0,0).
+ 5 pts Some other vector is used as a normal vector in plane eqn centered at either P, Q or (0,0,0).
+ 4 pts Cross product applied with two parallel vectors but no plane equation given
+ 3 pts Eqn of some plane is given, with normal vector incorrect and not parallel to correct plane, and not
centered at either P, Q or (0,0,0)
+ 3 pts Attempt to use cross product, but applied to incorrect vectors and no plane equation given
+ 2 pts Some minimal relevant work, but nothing correct
+ 0 pts Blank or totally incorrect
+ 0 pts Correct answer with no/insufficient work shown, or otherwise suspicious submission
+ 6 pts Arithmetic mistake in cross product, and malformed point-normal equation of plane.
