Answer:
<h2>1986, 1996</h2>Step-by-step explanation:
Given, Annual passenger revenue for the years 1980 to 2000 id=s modeled with the formula .
Here, is the annual revenue in millions of dollars,
is the number of years since January 1, 1980.
Revenue in a year was $ 790 million.
So,
So, after 6 yrs and 16 yrs from January 1, 1980, the Passenger revenue equals $ 790 million.
∴ Passenger revenue equals $ 790 million in 1986 and 1996.