Using the number of traffic fatalities for the 30-year period beginning in 1985 (1985 = year 1),

Question:

Using the number of traffic fatalities for the 30-year period beginning in 1985 (1985 = year 1), a western state wants to forecast traffic fatalities for 2015, 2016, and 2017. Using the following regression, make these forecasts and place an 80% confidence limit around the forecasts.
= 1,246 + 36.4X
sb = 1.9 Sy|x = 154 r2 = .97 = 15.5 sx = 8.8