Answer:
320
Step-by-step explanation:
If t = 0 corresponds to 1990, then at the year of 2006 t equals:
![t = 2006 -1990 = 16\ years](https://img.qammunity.org/2020/formulas/business/college/yrphozbs1ow08vmlssgz6pkqbg42hzdzyv.png)
Predicted annual sales as a function of time is given by the following expression:
![F(t) = 80+15t](https://img.qammunity.org/2020/formulas/business/college/e8500h6xneftc4ma982jvktk053vpysifz.png)
for t = 16:
![F(16) = 80+15*16\\F = 320](https://img.qammunity.org/2020/formulas/business/college/dp4148abkfyqhfw1t10sdyhph0ta34tniu.png)
The predicted annual sale, for the given product line, for the year 2006 is 320.