Writing Linear Equations
In 1996, the cost of tuition at a large Midwestern university was $145 per credit hour. In 2004, tuition had risen to $209 per credit hour.
Determine a linear equation to represent the cost, C, of tuition in terms of x, the number of years since 1990.

Linear Equation:  
In the year 2006, tuition will be $ per credit hour.
In the year , tuition will be $249 per credit hour

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