The relationship between the cricket chirp and the temperature can also be studied using the Celsius scale instead of the Fahrenheit Scale. However, the pattern you will find will need to use 2 operations, division and addition.
When the temperature is 19 degrees, the cricket chirped 45 times in a 25-second period. At 21 degrees, the cricket chirped 51 times in the same time period. And when the temperature is 24 degrees, the cricket chirps 60 times in the same time period.