Monday, September 29, 2008

HW14


Questions, comments?

What is a Derivative?

Visit our homework site for a file that explains instantaneous rate of change.

4 comments:

Anonymous said...

I really don't understand what a derivative is...
I read the packet like 5 times but I still don't know what to do...

Nadia said...

Yeah! HW 14 is pretty vague about what a derivitive actually IS, and then all of a sudden asks us to find it.
Whoa.

As trite as this may seem, I've been reading about deritivitives on Wikipedia.
http://en.wikipedia.org/wiki/Derivitives

There are some helpful pictures. It also explains the concept in a few different ways, which is always good!

Plus there's this cool thing:
http://en.wikipedia.org/wiki/Image:Graph_of_sliding_derivative_line.gif

Mr. Marti said...

good finds, nadia.

"Derivatives" are what mathematicians have decided to use for instantaneous rate of change. If you can find the instantaneous rate of change, then you have actually found the derivative. They mean the same thing.

Our way of approximating the instantaneous rate of change (derivative) is still a valid approach. Another way is to find the slope of the "tangent line". Here is a really cool animation of secants lines turning into a tangent line.

http://www.math.umn.edu/~garrett/qy/Secant.html

Anonymous 9:29 said...

Although a bit late, we can pretty much use the same method we've been using to find the derivative, or instantaneous rate of change.