N 1990, the cost of tuition at a large Midwestern university was $102 per credit hour. In 1999, tuition had risen to $228 per credit hour. Determine a linear equation
C
to represent the cost of tuition in terms of
x
, the number of years since 1990.

C
=

In the year 2004, tuition will be $
per credit hour.
In the year
, tuition will be $326 per credit hour