A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln for various times (in minutes) is shown in the following table.
Time, min Temperature, °F
15 2150
20 2100
30 2000
60 1700
(a) Find a linear model for the temperature of the pottery after minutes.
T(t)=? _____