A new high school math project is being tested in the state. In the first year (year 1), there are 630 students involved. By the end of the third year (year 3), 12554 students are expected to be involved. Assuming the increase is linear, write the equation of the line, in slope-intercept form, representing the number of students participating in this project for each year x. Use this result to predict the number of students involved at the end of 5 years.
Hint: Use the ordered pairs (1, 630) and (3, 12554).