Question

1990, the cost of tuition at a large Midwestern university was $101 per credit hour. In 2005, tuition had risen to $236 per credit hour.

Answer 1

Solution:

According to the problem, the linear equation would be:

$C(X)=101+9(x-1990)$

now, if x=2013, the tuition will be:

$C(2013)=101+9(2013-1990)=101+9(23)$

this is equivalent to

$C(2013)=101+9(23)=308$