O GRAPHS AND FUNCTIONS C Hannah Word problem involving average rate of change GOOD 05 Esp Ravi is cooking a roast. The table below gives the temperature R () of the roast (in degrees Celsius), at a few times / (in minutes) after he removed it from the oven. Time t Temperature R (1) (minutes) (.C) 0 184.3 20 140.3 30 109.3 50 51.3 60 28.3 (a) Find the average rate of change for the temperature from 20 minutes to 30 minutes. .C per minute (b) Find the average rate of change for the temperature from 50 minutes to 60 minutes. .C per minute X 5 2