In an Effort to Control Johne's Disease in Dairy Cattle

Short Answer

In an effort to control Johne's disease in dairy cattle, the state of Minnesota set a goal to reduce the number of cattle with the disease from 15,015 in 1990 to 1,629 in by the year 2000.
A) Assuming a linear model, what would the average rate of change be per year?
B) Assuming an exponential model, what would be the decay factor needed?
Round answers to 3 decimal places if necessary.