Find the average rate of change of the function f(x) = √x from x1 = 4 to x2 = 100. In 2000, 54% of the residents in a large city regularly used newspapers for getting news and this has decreased at an average rate of approximately 1.4% per year since then. Find a linear function in slope-intercept form that models this description. The function should model the percentage of residents, P(x), who regularly used the news outlet x years after 2000.