1. 
Which of the following is not a differential equation? >

2. 
Determine the order of the differential equation f ^{4}(x) + f ^{(2)}(x) = 5  f ^{(3)}(x) + f (x) > 2

3. 
A solution to a differential equation is > the highest derivative in that differential equation.

4. 
The function y = x^{2} is a solution to which one of the following differential equations? > 2y = y'

5. 
Determine which of the following functions is NOT a solution to the d.e. f ^{(2)}(x) = f (x). > f (x) = e^{  x}

6. 
Determine which of the following functions is a solution to the IVP y" = y and y(0) = 1. > y = e^{x}

7. 
Determine which of the following is the particular solution to the IVP y" = 8. > y = 4x^{2}  8x + 1

8. 
Determine which differential equation best represents the following English statement: The monkey population is increasing at a rate of 1 percent. >

9. 
Julianna spends 20 per week. If M represents Julianna's money and t represents time measured in years, which differential equation best describes this situation? >

10. 
A family of rabbits has a birth rate of 25 percent. Every year 10 rabbits die. Which of the following differential equations best models this situation? >
