Anticipating a phenomenal overall average on the Math 1329 Midterm, Dr. Train removed a celebratory homemade pizza from the oven before settling down to grade. The temperature T, in degrees Fahrenheit, of the pizza is modeled by T = f(t) where t is the time in minutes since it was put on the counter. Write one, complete sentence which best describes f'(t). This must reflect your very best work: it needs to be legible and have thought, spelling and grammar that all reflect college-level writing in order to be graded.