____	1.	Shown above is a slope field for which of the following differential equations?

a.	
b.	
c.	
d.	
e.	

____	2.	

Shown above is a slope field for which of the following differential equations?

a.	
b.	
c.	
d.	
e.	
3. Population y grows according to the equation  where k is a constant and t is measured in years. If the population doubles every 20 years, then the value of k is

a.0.069		b.0.200			c.0.035		d.3.322			e.5.000

4. The rate of change of the volume, V, of water in a tank with respect to time, t, is directly proportional to the square root of the volume. Which of the following is a differential equation that describes this relationship?

a.		b.		c.		d.		e.	

5. 

6.