Not the finite entry
Feb. 9th, 2011 05:12 am![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
sniffnoyEDIT: Unlocked May 17th, 2017.
But this needed to be repeated. From grading exams today. (Not teaching a class doesn't mean I don't still have to grade exams anyway.)
Problem I was grading, they had some data points for a function f, part c asked them to estimate f(1.25) (by extrapolating the function linearly). Then part d asked them whether this was more likely an overestimate or an underestimate (to be determined by looking at the function's concavity). The points they were given had sizes on the order of 1/2 or 1 or so.
Well, one guy, after getting part a right but doing nothing for part b, turned in for part c the assertion that f(1.25)=200, with no hint at all as to how he might have arrived at such a conclusion. "200?!" I thought, "How the hell did he come up with that? That's way too large."
I mark it a 0 and go on to part d; is it an overestimate or an underestimate? "This is an overestimate," he wrote, "because it's just a number I made up to be way too large."
But this needed to be repeated. From grading exams today. (Not teaching a class doesn't mean I don't still have to grade exams anyway.)
Problem I was grading, they had some data points for a function f, part c asked them to estimate f(1.25) (by extrapolating the function linearly). Then part d asked them whether this was more likely an overestimate or an underestimate (to be determined by looking at the function's concavity). The points they were given had sizes on the order of 1/2 or 1 or so.
Well, one guy, after getting part a right but doing nothing for part b, turned in for part c the assertion that f(1.25)=200, with no hint at all as to how he might have arrived at such a conclusion. "200?!" I thought, "How the hell did he come up with that? That's way too large."
I mark it a 0 and go on to part d; is it an overestimate or an underestimate? "This is an overestimate," he wrote, "because it's just a number I made up to be way too large."
no subject
Date: 2011-02-09 02:21 pm (UTC)no subject
Date: 2011-02-09 07:41 pm (UTC)