Homework 2 Solutions _ LIFESCIENC 30B mathematics for life science
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Course
LIFESCIENC 30B
Institution
LIFESCIENC 30B
Homework 2 Solutions
Rubric
4 problems were graded in the following scale for a total of 10 points.
4.1.Exercise 7: (2 points)
• 2 points: Have 3 graphs (Trajectory + Time Series for both V and X) AND a description of
the trend of the graph as the value of a changes
• 1 point: Either th...
2017 rubric 4 problems were graded in the following scale for a total of 10 points 41exercise 7 2
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Homework 2 Solutions
January 26, 2017
Rubric
4 problems were graded in the following scale for a total of 10 points.
4.1.Exercise 7: (2 points)
• 2 points: Have 3 graphs (Trajectory + Time Series for both V and X) AND a description of
the trend of the graph as the value of a changes
• 1 point: Either the description is missing or one of the graphs is missing
• 0 point: Blank answer
4.1.Further Exercise 2: (2 points)
• 2 points: Able to state that the trajectory will never reach the limit cycle attractor along
with a detailed explanation OR state that the trajectory will reach the limit cycle attractor
but demonstrate a good effort to explain their answer
• 1 point: Missing a detailed explanation
• 0 point: Blank answer
4.2.Further Exercise 1: (4 points)
Part a: (2 points)
• 2 points: Able to identify negative feedback loop
• 1 point: Any other kind of answer
• 0 point: Blank answer
Part b: (2 points)
• 2 points: A detailed explanation that will address either sensitivity of the system or time-delay
• 1 point: An explanation that somewhat lacks in effort (e.g. state a solution without much
explanation)
1
, LS 30B Homework 2 Solutions Jan 26, 2018
• 0 point: Blank answer
4.4.Exercise 8: (2 points)
• 2 points: Produce a graph with two nullclines + four test points (along with their respective
vectors) + some sort of mathematical calculations (even some numbers or algebraic expres-
sions are fine)
• 1 point: Produce a graph with two nullclines + four vectors but missing some sort of mathe-
matical calculations (numbers or algebraic expressions)
• 0 point: Unable to produce a graph
2
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