# Math Help - Rate of Change

1. ## Rate of Change

Let f(x,y)=(x^2)+ln(y)

a. Find the average rate of change of f as you go from (4,1) to (3,2).
b. Find the instantaneous rate of change of f as you leave point (4,1) heading towards (3,2).

2. ## Re: Rate of Change

Originally Posted by mgwalker
Let f(x,y)=(x^2)+ln(y)

a. Find the average rate of change of f as you go from (4,1) to (3,2).
b. Find the instantaneous rate of change of f as you leave point (4,1) heading towards (3,2).
Your class notes or textbook will have theory and examples to follow. What have you tried and where are you stuck?

3. ## Re: Rate of Change

Originally Posted by mr fantastic
Your class notes or textbook will have theory and examples to follow. What have you tried and where are you stuck?
I think he got stuck on the "do more than just copy your homework to MHF" part... /: