If f and g are functions of time, and at time t = 2, f equals 5 and is rising at a rate of 6 units per second, and g equals 7 and is rising at a rate of 9 units per second, then f/g equals and is changing at a rate of units per second. If f and g are functions of time, and at time t = 3, f equals 9 and is rising at a rate of 6 units per second, and g equals 8 and is rising at a rate of 9 units per second, then f/g equals and is changing at a rate of units per second.