A squirrel population can increase at a rapid rate if left unchecked. Assume that 20 squirrels are put in an enclosed wildlife ranch and the squirrel population quadruples each year for the next 5 years, as shown in the table. Year

Rabbit Population

0

20

1

80

2

320

3

1280

4

5120

5

20,480

Part A: Let y represent the number of squirrels after x years. Build a function rule that can be used to model y as a function of x, where x is a non-negative number.

Question 19 options:

A y=4(20)x-1

B y=20(4)x-1

C y=20(4)x

D y=4(20)x