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First, I got rid of part (c) in 2.7.3 and changed the MC options in the revised activity. My thinking is that this more focused now around the (in)dependence and spanning/not spanning of the solution set.
Second, I copied this sequence with a more complex example (this time having 4 free variables).
My reasoning is that this example is now meaty enough that we will be forced to consider how we might test that the resulting set is independent. I suspect some teams may defer to the methods of EV4/EV6 and then we probe them about why it's the case that these guys are automatically independent.
Because this example is so meaty, I got rid of the two examples that follow but kept the one where the solution space is trivial.
While we're touching this, can we add <answer>s for the instructor edition?
do we give answers for all parts, or just the MC?
Definitely MCQs, other things can't hurt either, with the ultimate goal of having answers for everything someday (at least enough for an instructor to use).
It was the settings.json file, I just discarded those changes so it will merge fine. You had started work on this before we de-tracked the settings.json file is why that popped up.
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My attempt at addressing #352.
First, I got rid of part (c) in 2.7.3 and changed the MC options in the revised activity. My thinking is that this more focused now around the (in)dependence and spanning/not spanning of the solution set.
Second, I copied this sequence with a more complex example (this time having 4 free variables).
My reasoning is that this example is now meaty enough that we will be forced to consider how we might test that the resulting set is independent. I suspect some teams may defer to the methods of EV4/EV6 and then we probe them about why it's the case that these guys are automatically independent.
Because this example is so meaty, I got rid of the two examples that follow but kept the one where the solution space is trivial.