def expo(N, r, t):
return N * exp(r*t)
time = 10
n0 = 100.
pop_sizes = [n0]
for years in range(1, time):
pop_sizes.append(expo(pop_sizes[-1], 0.002, years))
series = []
for p in range(len(pop_sizes)):
series.append([p, pop_sizes[p]])
line(series, marker='.')
