Find the Expression

Question

An experiment is underway to test the effect of extreme temperatures on a newly developed liquid. Two hours into the experiment the temperature of the liquid measured to be -17 degrees celsius. After eight hours of the experiment the temperature of the liquid is -47 degrees celsius. Assume that the temperature has been changing at a constant rate throughout the experiment and will continue to do so. Write and expression for this problem.

Answer 1

I would make this expression:

T(temperature) =((T2-T1)/(t2-t1)*t

for 2<t<8

and T>17