It would be better to add more test cases to reinforce the test suite.
Thanks I just updated!
Using without the "round" fudge on the polyfit function should work, but gives errors on the order of 1e-14. Round only works because all the coefficients in your test suite are integers.
Find relatively common elements in matrix rows
Project Euler: Problem 8, Find largest product in a large string of numbers
Find the "ordinary" or Euclidean distance between A and Z
Change a specific color in an image
MATCH THE STRINGS (2 CHAR) very easy
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