Entomologists have discovered that a linear relationship exists between the number of chirps of crickets of a certain species and the air temperature. When the temperature is 70, the crickets chirp charps at the rate of 120 Find N as a function of 7 and use this formula to determine the rate at which the crickets chirp when, and when the temperature is 80, they chirp at the rate of 160 the temperature is 109 F min