Answer:
320
Explanation:
If t = 0 corresponds to 1990, then at the year of 2006 t equals:
[tex]t = 2006 -1990 = 16\ years[/tex]
Predicted annual sales as a function of time is given by the following expression:
[tex]F(t) = 80+15t[/tex]
for t = 16:
[tex]F(16) = 80+15*16\\F = 320[/tex]
The predicted annual sale, for the given product line, for the year 2006 is 320.