2. The number of new contributors to a public radio station's annual fund drive over the last ten years is 170, 168, 165, 172, 178, 180, 175, 185, 180, 188 Develop a trend equation (regression equation) for this information, and use it to predict period 11's number of new contributors. What is the trend equation _ What is the forecast for Period 11 What is the R square value? What does R square signify? Is the equation significant? How do you know