Plot derivative of a function

[Wes Loewer]

(06-04-2014 08:26 AM)Maro Wrote:  

(06-04-2014 06:56 AM)Wes Loewer Wrote:  … I take off a token point on a test. :-)

just one token point for something which is wrong? … You are really generous!

It depends on the context. Suppose a 10 point problem asked students to find some quantity which required the signed area under a function, f(x), from 0 to some value x, and they wrote ∫ f(x) dx from 0 to x, but correctly found the anti-derivative, correctly evaluated it at the endpoints, subtracted, and gave a correct interpretation. Yeah, I'd probably take off only one point. Call me a push-over, but I'd say they got about 90% of the math correct. :-)