Graph and Analyze an Exponential Function Progress is being made on the incidence of measles in an African country, as a result of an accessible vaccination program. The number of diagnosed cases in thousands as a function of time, t , in years from 2016 is given by () = 16(2 1− ) − 1 a) Inspect the function and explain why this equation represents a decreasing function. b) State the equation of the horizontal asymptote. c) Find the intercepts and graph the function. Can the One-to-One Property of Exponentiation be used to find the t-intercept? d) State the practical domain and range of this function in interval notation.