Question

The Ehrenberg equation gives the relationship between the weight W (in kilograms) and the height h (in meters) of a child between the ages of 5 and 13 years old.

a. Research to find the Ehrenberg equation.

b. Find the relationship of a child of the height that you choose. If my choosen height is 2.5m.

c. Find the derivative and use this to find the rate of change for your child.

d. Do you think that this is a good model?

e. Are there other models that you might consider

Answer 1

I had never heard of Ehrenberg's equation, so I googled it and found it in less than 5 seconds.
I bet you can too.

Answer 2

Yes Reiny i know the Ehrenberg's equation it is ln W = ln 2.4 + 1.84h. It is finding the derivatives to find the rate of change for the child i am having a problem with

Answer 3

Since ln 2.4 is just a number, it's like saying
w(h) = ah+b

surely that presents no problems in finding the derivative?

No idea whether it's a good model.

Answer 4

The equation I found is

W = 5.2911e^.0467h

I found this webpage with almost your identical question

http://www.justanswer.com/math-homework/79i35-ehrenberg-equation-gives-relationship-weight.html

Answer 5

Hello Reiny,The one i found is log(W) = 0.8*h + 0.4 now i wounder which is correct.