An oil slick spreads at sea. From time to time, but irregularly, a helicopter is dispatched to photograph the oil slick. On each trip, the helicopter arrives over the slick, the pilot takes a picture, waits 10 minutes, takes another, and heads home. On each of seven trips the size (in area) of the slick is measured from both photographs. Initial Observation 10 min. later
1.047 1.139
2.005 2.087
3.348 3.413
5.719 5.765
7.273 7.304
8.41 8.426
9.117 9.127

Required:
Build a model for the size of the oil slick at time = t.