Solution for Problem 2.5.2

Find the constant of proportionality.
z is inversely proportional to the cube of w.  If w = 2, then z = 3.  

Solve	Step
The goal is to find k, the constant.	Plug in the values
	Use the formula for inverse variation
If w = 2, then z = 3.	Given
	Plug in w and z
	Cube 2 and multiply both sides by 8
k = 24	constant of proportionality
	Plug 45 in formula for k
Check   If w = 2, then z = 3.     z = 3