the expression:553.7x 27,966

can be used to approximate the average annual salary in dollars of public school teacher in the year 1985 x

1. what was the average teachers salary in dollars of public school teacher in 1993?

2. in which year will the average salary reach $45,000?

Please clarify - it seems that the equation you wrote: 553.7x 26,996 is incomplete, as it shoud be a functio of time.