1. In the function equation ff (xx ) = 1500 (1.43)^x, is this growth or decay? What is the percent of growth/decay? What is the initial value? 2. The number of bacteria in a sample can be modeled by the equation yy = 75(.8)^x, where y is the number of bacteria and x is the number of days elapsed. What is the rate of decay? 3. Monthly car sales for a certain type of car are $350,000 and sales are depreciating at a rate of 3% per month. a. Write an equation to represent this situation. b. What will the monthly sales be after 8 months? 4. Two auction websites start with 100 members each. At site A, the number of members doubles each month. At site B, 500 new members are added each month. Between months 5 and 6, which website gains more members and by how much?