the temperature has been changing at a rate of-2 degrees fareinheit per hour and is predicted to continue at this rate. The temperature now is 0 degree fareinheit. what was the temperature 3 hours ago? what temperature can be predicted 5 hrs. from now?

Answer 1

if now is time t=0, then the temperature at any time t is -2t.

So, we want

-2(-3)
and
-2(5)