Answer:
Infected = itself + itself
Healthy = 200 - infected
y axis = weeks
x axis = # of people
use green for healthy and red for infected
and mark going by weeks
green:
(1, 199)
(2, 198)
(3, 196)
(4, 192)
(5, 184)
(6, 168)
(7, 136)
(8, 72)
(9, -56)
red:
(1, 1)
(2, 2)
(3, 4)
(4, 8)
(5, 16)
(6, 32)
(7, 64)
(8, 128)
(9, 256)
(10, 512)