Point slope form and equations of lines

Question

cost of College. The total cost C, in thousands of constant 2011 dollars, of a year at a public two-year college can be approximated by

1. C=18t+8.5,

where t is the number of years since 1997. Graph the equation and use the graph to predict the cost of a year at a public two-year college in 2014.

Answer 1

We can't graph for you.

Let t = 17 years (1997 to 2014)

Substitute 17 for t

C=18t+8.5

C = (18)(17) + 8.5

You can solve this.