Question

How would you go about solving this?

Answer 1

Can't we just put the value corresponding to 20=w and 10=T i.e. -9?

Answer 2

No, it is something to do with contour lines and first derivatives of multi-variable functions.

Answer 3

you have to find the rise/run of the adjacent contour line but I am not quiet sure... haha..

Answer 4

i was going to try, not anymore.

Answer 5

fw(20,10)
delta w = 10
delta f(w,T) = -4
-2/5

Answer 6

ah... I feel really stupid now....

Answer 7

ft(10,35)
delta t = 35
delta f(w,T) = off the graph?

Answer 8

err chart, not graph.

Answer 9

just use two points, I guess...

Answer 10

nm I get it now, thanks man.

Answer 11

just take the point up one and over one instead of down and back.

Answer 12

loooool

Answer 13

nice try; already solved.

Answer 14

I really hope you don't actually need this site, because if you do you're gonna have a terrible time in math class when your account is banned :/

Answer 15

Tukajo does have a good point...