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Match each linear system with one of the
phase plane direction fields. (The blue
lines are the arrow shafts, and the black
dots are the arrow tips.)
1.
2.
3.
4.
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Note: To solve this problem, you only need to compute eigenvalues.
In fact, it is enough to just compute whether the eigenvalues are real or complex
and positive or negative.
In order to get credit for this problem all answers must be correct.