At 75°F, a certain insect chirps at a rate of 99 times per minute, and at 78°F, they chirp 126 times per minute. Write an equation in slope-intercept form that represents the situation.

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?