The Snowtree Cricket Behaves in a Rather Interesting Way: the Rate

Multiple Choice

The Snowtree cricket behaves in a rather interesting way: The rate at which it chirps depends linearly on the temperature. One summer evening you hear a cricket chirping at a rate of 140 chirps per minute, and you notice that the temperature is 80°F. Later in the evening, the cricket has slowed down to 120 chirps per minute, and you notice that the temperature has dropped to 75°F. What is the temperature if the cricket is chirping at a rate of 108 chirps per minute ?

A) 72°F
B) 70°F
C) 78°F
D) 67°F
E) 76°F