a) i)
a= 60,000, the Original number in the stadium, the y-intercept.
ii) 1) b = 60,000/30 = 2000
2) the value of b in this situation represents the amount of people who exit per minute, or the gradient.
iii) t = (a-N)/b
iv)
t = 10000/2000
t = 5 mins
v) more gradual decline after 15 minutes, meaning people leaving alot slower.