The frequency with which a cricket chirps varies directly with the temperature. if the cricket chirps 100 times per minute in 80° weather, it will chirp how many times per minute in 92° weather?
115 chirps.
Since it varies directly, you divide 100 by 80.
100 chirps / 80 degrees = x = 1.25
1.25 x 92 degrees = 115 chirps