Regression Analysis with T = 1 to 40 Was Used $= 1500 + 5 t + 1.5 Q _ { 1 } + 1.8 Q _ { 2 } - 3.0 Q _ { 3 }$

Essay

Regression analysis with t = 1 to 40 was used to develop the following equation: $= 1500 + 5 t + 1.5 Q _ { 1 } + 1.8 Q _ { 2 } - 3.0 Q _ { 3 }$ ,
where: $Q _ { i }$ = 1, if quarter i (i = 1, 2, 3)
= 0, otherwise.
Forecast the next four quarters.