So h of 5 minus h of 2, and this is obviously going to be in degrees Celsius, over the number of minutes that changed. So we end at 5 minutes and we started at 2 minutes. And so the rate is going to be approximately at 5 minutes, our temperature is 52 degrees. At 2 minutes, our temperature is 60 degrees. And then this is over a change in 3 minutes. 5 minus 2 is 3. So this gets us, let me scroll to the right a little bit, this gives us negative 8 degrees Celsius over 3 minutes.