If f and g are functions of time, and at time t = 2, f equals 4 and is rising at a rate of 5 units per second, and g equals 7 and is rising at a rate of 9 units per second, then f/g equals 4/7 4/7 and is changing at a rate of -1/49 -1/49 units per second.

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Exponential Growth Model

The relation that represents an exponential function is: