Suppose that the spread of a disease through the student body at an isolated college campus can be modeled by 10,000 y = -0.95t 1 + 9999e where y is the total number affected at time t (in days). Find the rate of change of y.

As a part of a grand opening, an arcade gave out free tokens to tye first 100 customers. The graph shows the number of tokens costomers received for each dollar spent at the play more arcade. Find the interpret rate of change of change and the initial value

The population of the town of Missed Chances has, since January 1, 1973, been described by the function P=45000(1.04)^t where PP is the population tt years after the start of 1973.  At what rate was the population changing on January 1, 1998?

What is the rate of decay after 15 years? what is the rate of decay after 45 years?